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{
STIHL HL 92
Instruction Manual
Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2016
0458-518-0121-A. VA1.M16.
0000007404_002_GB
HL 92, HL 92 K
English
1
{
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
It has been built using modern
production techniques and
comprehensive quality assurance.
Every effort has been made to ensure
your satisfaction and troublefree use of
the product.
Please contact your dealer or our sales
company if you have any queries
concerning this product.
Your
Dr. Nikolas Stihl
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 2
Using the Unit 8
Approved Power Tool Attachments 10
Assembling the Unit 10
Fuel 12
Fueling 13
Adjusting the Cutter Bar 14
Fitting the Harness 15
Starting / Stopping the Engine 16
Operating Instructions 18
Cleaning the Air Filter 19
Adjusting the Carburetor 19
Spark Plug 20
Lubricating the Gearbox 21
Sharpening Instructions 22
Storing the Machine 22
Inspection and Maintenance by
User 22
Inspections and Maintenance by
Dealer 23
Maintenance and Care 24
Minimize Wear and Avoid Damage 26
Main Parts 27
Specifications 28
Maintenance and Repairs 29
Disposal 29
EC Declaration of Conformity 29
HL 92, HL 92 K
English
2
Pictograms
The meanings of the pictograms
attached to the machine are explained in
this manual.
Depending on the model concerned, the
following pictograms may be attached to
your machine.
Symbols in text
WARNING
Warning where there is a risk of an
accident or personal injury or serious
damage to property.
NOTICE
Caution where there is a risk of
damaging the machine or its individual
components.
Engineering improvements
STIHL's philosophy is to continually
improve all of its products. For this
reason we may modify the design,
engineering and appearance of our
products periodically.
Therefore, some changes, modifications
and improvements may not be covered
in this manual.
Observe all applicable local safety
regulations, standards and ordinances.
If you have not used this type of power
tool before: Have your dealer or other
experienced user show you how it is
operated or attend a special course in its
operation.
Minors should never be allowed to use a
power tool.
Keep bystanders, especially children,
and animals away from the work area.
When the power tool is not in use, shut it
off so that it does not endanger others.
Secure it against unauthorized use.
The user is responsible for avoiding
injury to third parties or damage to their
property.
Guide to Using this Manual
Fuel tank; fuel mixture of
gasoline and engine oil
Operate manual fuel
pump
Filler hole for gear
lubricant
Safety Precautions and
Working Techniques
Because a hedge trim-
mer is a high-speed, fast-
cutting power tool with
very sharp cutting blades
and a long reach, special
safety precautions must
be observed during
operation.
It is important that you
read the instruction man-
ual before first use and
keep it in a safe place for
future reference. Non-
observance of the
instruction manual may
result in serious or even
fatal injury.
HL 92, HL 92 K
English
3
Do not lend or rent your power tool
without the instruction manual. Be sure
than anyone using your power tool
understands the information contained
in this manual.
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
To operate the power tool you must be
rested, in good physical condition and
mental health.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
power tool.
Persons with pacemakers only: The
ignition system of your power tool
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. STIHL
recommends that persons with
pacemakers consult their physician and
the pacemaker manufacturer to reduce
any health risk.
Do not operate the power tool if you are
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
Use your hedge trimmer only for cutting
hedges, shrubs, scrub and similar
materials.
It must not be used for any other
purpose because of the increased risk of
accidents and damage to the machine.
Never attempt to modify your power tool
in any way since this may result in
accidents or damage to the machine.
Only use cutting blades and accessories
that are explicitly approved for this
power tool by STIHL or are technically
identical. If you have any questions in
this respect, consult a servicing dealer.
Use only high quality tools and
accessories in order to avoid the risk of
accidents and damage to the machine.
STIHL recommends the use of genuine
STIHL tools and accessories. They are
specifically designed to match the
product and meet your performance
requirements.
Never attempt to modify your machine in
any way since this may increase the risk
of personal injury. STIHL excludes all
liability for personal injury and damage
to property caused while using
unauthorized attachments.
Do not use a pressure washer to clean
your power tool. The solid jet of water
may damage parts of the power tool.
Do not spray the machine with water.
Clothing and Equipment
Wear proper protective clothing and
equipment.
WARNING
Wear hearing protection, e.g. earplugs
or ear muffs.
Wear a safety hard hat with chin strap
where there is a danger of head injuries
from falling objects.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Clothing must be sturdy
but allow complete free-
dom of movement. Wear
snug-fitting clothing, an
overall and jacket combi-
nation, do not wear a
work coat.
Avoid clothing that could
get caught on branches
or brush or moving parts
of the machine. Do not
wear a scarf, necktie or
jewelry. Tie up and con-
fine long hair (e.g. with a
hair net, cap, hard hat,
etc.).
Wear steel-toed safety
boots with non-slip soles.
To reduce the risk of eye
injuries, wear close-fit-
ting safety glasses in
accordance with Euro-
pean Standard EN 166.
Make sure the safety
glasses are a comforta-
ble and snug fit.
Wear heavy-duty work
gloves made of durable
material (e.g. leather).
HL 92, HL 92 K
English
4
Transporting the Power Tool
Always shut off the engine.
Always fit the blade guard (scabbard)
before carrying your hedge trimmer
short distances.
On units with a defined transport
position: Move the cutter bar to the
transport position and make sure it is
properly engaged.
Carry the power tool properly balanced
by the drive tube cutting blades behind
you.
To reduce the risk of serious burn
injuries, avoid touching hot parts of the
machine, including the gearbox housing.
Transporting by vehicle: Properly secure
your power tool to prevent turnover, fuel
spillage and damage.
Fueling
Always shut off the engine before
refueling.
Do not fuel a hot engine – fuel may spill
and cause a fire.
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly and avoid fuel spillage.
Fuel your power tool only in well-
ventilated areas. If you spill fuel, wipe
the machine immediately if fuel gets on
your clothing, change immediately.
This reduces the risk of unit vibrations
causing the fuel cap to loosen or come
off and spill quantities of fuel.
To reduce the risk of serious or fatal
burn injuries, check for fuel leakage. If
fuel leakage is found, do not start or run
the engine until leak is fixed.
Before Starting
Check that your power tool is properly
assembled and in good condition refer
to appropriate chapters in the instruction
manual.
Check the fuel system for leaks,
paying special attention to visible
parts such as the tank cap, hose
connections and the manual fuel
pump (on machines so equipped). If
there are any leaks or damage, do
not start the engine – risk of fire.
Have your machine repaired by a
servicing dealer before using it
again.
The stop switch must move freely.
Smooth action of choke knob,
throttle trigger lockout and throttle
trigger – the throttle trigger must
return automatically to the idle
position. The choke knob must
spring back from the g position to
the run position F when the throttle
trigger lockout and throttle trigger
are squeezed.
Check that the spark plug boot is
secure – a loose boot may cause
arcing that could ignite combustible
fumes and cause a fire.
Cutting blades securely mounted
and in good condition (clean, move
freely, not warped), properly
sharpened and thoroughly sprayed
with STIHL resin solvent (lubricant).
On units with adjustable cutter bar:
Make sure the adjuster is properly
engaged in the required position for
starting.
On units with a defined transport
position (cutter bar folded against
drive tube): Never attempt to start
the unit in the transport position.
Never attempt to modify the controls
or safety devices in any way.
Keep the handles dry and clean –
free from oil and dirt – for safe
control of the power tool.
Adjust shoulder strap and handles
to suit your height and reach. See
chapter on "Fitting the Harness".
To reduce the risk of accidents, do not
operate your power tool if it is damaged
or not properly assembled.
If you use a shoulder strap: Practice
removing and putting down the machine
as you would in an emergency. To avoid
damage, do not throw the machine to
the ground when practicing.
Starting the Engine
Start the engine at least 3 meters from
the fueling spot, outdoors only.
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
After fueling, tighten
down the fuel tank cap as
securely as possible.
HL 92, HL 92 K
English
5
Place the power tool on firm ground in
an open area. Make sure you have good
balance and secure footing. Hold the
power tool securely. The cutting blades
must be clear of the ground and all other
obstructions because they may begin to
run when the engine starts.
Your power tool is designed to be
operated by one person only. Do not
allow other persons in the work area –
even when starting.
To reduce the risk of injury, avoid
contact with the cutting blades.
Do not drop start the power tool – start
the engine as described in the
instruction manual. Note that the cutting
blades continue to run for a short period
after you let go of the throttle trigger
(flywheel effect).
Check idle speed setting: The cutting
blades must not move when the engine
is idling with the throttle trigger released.
To reduce the risk of fire, keep hot
exhaust gases and hot muffler away
from easily combustible materials (e.g.
wood chips, bark, dry grass, fuel).
Holding and Controlling the Power Tool
Always hold the power tool firmly with
both hands on the handles.
Make sure you have firm and secure
footing and hold the power tool so that
the cutting blades are always away from
your body.
Some versions of the machine can be
carried on a harness to relieve the
weight on the operator's arms.
Models with loop handle
Right hand on control handle, left hand
on loop handle on drive tube, even if you
are left-handed. Wrap fingers and
thumbs firmly around the handles.
Machines with handle hose
Right hand on control handle, left hand
on handle hose on drive tube, even if
you are left-handed. Wrap fingers and
thumbs firmly around the handles.
During Operation
In the event of impending danger or in
an emergency, switch off the engine
immediately – move the stop switch in
the direction of 0.
To reduce the risk of damage to
property, also maintain this distance
from other objects (vehicles, windows).
Watch the cutting blades at all times do
not cut areas of the hedge that you
cannot see.
Be extremely careful when cutting tall
hedges, check the other side of the
hedge before starting work.
Make sure the idle speed setting is
correct. The cutting blades must not run
when the engine is idling with the throttle
trigger released. Check and correct the
idle speed setting regularly. If the cutting
blades still run when the engine is idling,
have your dealer check your machine
and make proper adjustments or repairs.
Note that the cutting blades continue to
run for a short period after you let go of
the throttle trigger – flywheel effect.
Take special care in slippery conditions
(ice, wet ground, snow) – on slopes or
uneven ground.
Clear away fallen branches, scrub and
cuttings.
0000-GXX-1677-A00000-GXX-1678-A0
This power tool is not
insulated against electric
shock. To reduce the risk
of electrocution, keep
well clear of electric
power lines.
To reduce the risk
of injury from mov-
ing blades or falling
cuttings, do not
allow bystanders
within 5 meters of
your own position.
5m (17ft)
HL 92, HL 92 K
English
6
Watch out for obstacles: Roots and tree
stumps which could cause you to trip or
stumble.
Make sure you always have good
balance and secure footing.
When working at heights:
Always use a lift bucket
Never work on a ladder or in a tree
Never work on an insecure support
Never operate your power tool with
one hand
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
To reduce the risk of accidents, take a
break in good time to avoid tiredness or
exhaustion.
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
To reduce the risk of serious or fatal
injury from breathing toxic fumes,
ensure proper ventilation when working
in trenches, hollows or other confined
locations.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only when working.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
The dusts, vapor and smoke produced
during operation may be dangerous to
health. If the work area is very dusty or
smoky, wear a respirator.
If your power tool is subjected to
unusually high loads for which it was not
designed (e.g. heavy impact or a fall),
always check that it is in good condition
before continuing work – see also
"Before Starting". Check the fuel system
in particular for leaks and make sure the
safety devices are working properly. Do
not continue operating your power tool if
it is damaged. In case of doubt, consult
your servicing dealer.
Do not operate your power tool in the
starting throttle position – engine speed
cannot be controlled in this position.
Inspect the hedge and work area to
avoid damaging the cutting blades:
Remove stones, rocks, pieces of
metal and other solid objects.
When working close to the ground,
make sure that no sand, grit or
stones get between the blades.
Take particular care when cutting
hedges next to or against wire
fences.
To avoid the risk of electrocution, do not
touch electric power lines – never cut
through electric power lines.
Opening the throttle while the blades are
blocked increases the load and reduces
engine speed. The clutch then slips
continuously and this causes
overheating and damage to important
components (e.g. clutch, polymer
housing components) – and this can
increase the risk of injury from the
blades moving while the engine is idling.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated loca-
tions, even if your model
is equipped with a cata-
lytic converter.
The gearbox becomes
hot during operation. To
reduce the risk of burn
injury, do not touch the
gearbox housing.
Do not touch the cutting
blades while the engine is
running. If the cutting
blades become jammed
by an object, switch off
the engine immediately
before attempting to
remove the objectthere
is otherwise a risk of
injury.
HL 92, HL 92 K
English
7
If the hedge is very dusty or dirty, spray
the blades with STIHL resin solvent from
time to time during cutting. This helps
greatly reduce blade friction as well as
the aggressive effects of sap and the
build-up of dirt particles.
Before leaving the power tool
unattended: Shut off the engine.
Check the cutting blades at regular short
intervals during operation or
immediately if there is a noticeable
change in cutting behavior:
Shut off the engine.
Wait until the cutting blades have
come to a complete standstill.
Check condition and tightness, look
for cracks.
Check sharpness.
To reduce the risk of fire, always clean
plant residue, chips, leaves and excess
lubricant off the engine and muffler.
After finishing work
Always clean dust and dirt off the
machine – do not use any grease
solvents for this purpose.
Spray the blades with STIHL resin
solvent. Run the motor briefly to ensure
that the solvent is evenly distributed.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands (whitefinger
disease).
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
Hand protection (wearing warm
gloves)
Work breaks
The period of usage is shortened by:
Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensations).
Low outside temperatures.
The force with which the handles
are held (a tight grip restricts
circulation).
Continual and regular users should
monitor closely the condition of their
hands and fingers. If any of the above
symptoms appear (e.g. tingling
sensation in fingers), seek medical
advice.
Maintenance and Repairs
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the instruction manual.
Have all other work performed by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
Only use high-quality replacement parts
in order to avoid the risk of accidents
and damage to the power tool. If you
have any questions in this respect,
consult a servicing dealer.
STIHL recommends the use of original
STIHL replacement parts. They are
specifically designed to match your
model and meet your performance
requirements.
To reduce the risk of injury, always shut
off the engine before carrying out any
maintenance or repairs or cleaning the
machine. – Exception: Carburetor and
idle speed adjustments.
Do not turn the engine over on the
starter with the spark plug boot or spark
plug removed since there is otherwise a
risk of fire from uncontained sparking.
To reduce the risk of fire, do not service
or store your machine near open flames.
Check the fuel filler cap for leaks at
regular intervals.
Use only a spark plug of the type
approved by STIHL and make sure it is
in good condition – see "Specifications".
Inspect the ignition lead (insulation in
good condition, secure connection).
Check the condition of the muffler.
To reduce the risk of fire and damage to
hearing, do not operate your machine if
the muffler is damaged or missing.
Do not touch a hot muffler since burn
injury will result.
Vibration behavior is influenced by the
condition of the AV elements check the
AV elements at regular intervals.
HL 92, HL 92 K
English
8
Cutting Season
Observe country-specific or municipal
rules and regulations for cutting hedges.
Do not use your hedge trimmer during
rest periods customary in the
neighborhood.
Cutting Sequence
If a radical cut is necessary, cut a little at
a time in several stages.
Use lopping shears to cut out thick
branches first.
Cut the sides of the hedge first, then the
top.
Disposal
Do not throw cuttings into the garbage
can – they can be composted.
Preparations
N Model with adjustable cutter bar:
Set the cutter bar to the straight (0°)
position.
N Remove the blade scabbard.
N Start the engine.
N If you use a harness: Put on the
harness and attach it to the
machine.
Working Techniques
Horizontal Cut (with cutter bar at an
angle)
Cutting close to the ground from a
standing position, e.g. low shrubs.
Swing the cutter bar up and down as you
move along the hedge – use both sides
of the cutting blades, do not rest the
cutter bar on the ground.
WARNING
The K version (HL 92 K) is not approved
for cutting close to the ground.
Vertical Cut (with cutter bar at an angle)
Cutting without standing directly next to
the hedge, e.g. flowerbed between
operator and hedge.
Swing the cutter bar up and down in an
arc as you move along the hedge – use
both sides of the cutting blades.
Using the Unit
388BA029 KN
HL 92, HL 92 K
English
9
Vertical Cut (with straight cutter bar)
Extra long reach without the need for
other aids.
Swing the cutter bar up and down in an
arc as you move along the hedge – use
both sides of the cutting blades.
Overhead Cut (with cutter bar at an
angle)
Hold the hedge trimmer vertically and
swing it in an arc to make maximum use
of its reach.
WARNING
Any working position above head height
is tiring. To minimize the risk of
accidents, work in such positions for
short periods only. Set the adjustable
cutter bar to the most suitable angle so
that the unit can be held in a lower, less
tiring position while still providing
adequate reach.
Horizontal Cut (with straight cutter bar)
Hold the cutter bar at an angle of 0° to
10° as you swing the hedge trimmer
horizontally.
389BA050 KN
HL 92, HL 92 K
English
10
Swing the cutter bar in an arc towards
the outside of the hedge so that the
cuttings are swept to the ground.
Recommendation: Only cut hedges that
are no more than chest height.
The following STIHL attachments may
be mounted to the basic power tool:
Mounting the Loop Handle (HL 92,
HL 94)
Loop handle is required on versions with
long drive tube (HL 92, HL 94).
N Place the clamp (1) in the loop
handle (2) and position them both
against the drive tube (5) between
the carrying ring (3) and handle
hose (4).
N Position the clamp (6) against the
shaft.
N Line up the holes.
N Insert the screws (7) with
washers (8).
N Fit the square nuts (9) and screws.
Approved Power Tool
Attachments
Attachment
1)
Loop handle required on versions
with long drive tube (HL 92, HL 94)
2)
Not approved for versions with
short drive tube (HL 92 K)
3)
Loop handle required
Application
HL 0°, 500 mm
1)
Long reach hedge
trimmer
HL 0°, 600 mm
1)
Long reach hedge
trimmer
HL 145°,
500 mm
1)
Long reach hedge
trimmer
HL 145°,
600 mm
1)
Long reach hedge
trimmer
HT
2)
Pole pruner
BF
2) 3)
Cultivator with pick
tines
SP 10 Special harvester
Assembling the Unit
7
8
2
1
6
7
8
9
9
3
5
4
0000-GXX-1679-A0
HL 92, HL 92 K
English
11
N Align the loop handle (2) and move
it to the most comfortable position
(recommended: about 20 cm).
N Tighten down the screws firmly.
Mounting the Gearbox
N Loosen the clamp screws (10).
N Push the gearbox (11) onto the
drive tube (5), turn the gearbox (11)
back and forth as necessary.
Once the end of the drive tube is
inserted beyond the slot in the
clamp (12):
N Push the gearbox (11) fully home as
far as stop.
N Tighten down the clamp screws
moderately.
N Line up the gearbox (11) with the
powerhead.
N Tighten down the clamp screws
firmly.
2
A
0000-GXX-1680-A0
11
10
10
5
0000-GXX-1681-A0
11
12
0000-GXX-1682-A0
HL 92, HL 92 K
English
12
Your engine requires a mixture of
gasoline and engine oil.
WARNING
For health reasons, avoid direct skin
contact with gasoline and avoid inhaling
gasoline vapor.
STIHL MotoMix
STIHL recommends the use of STIHL
MotoMix. This ready-to-use fuel mix
contains no benzol or lead, has a high
octane rating and ensures that you
always use the right mix ratio.
STIHL MotoMix uses STIHL HP Ultra
two-stroke engine oil for an extra long
engine life.
MotoMix is not available in all markets.
Mixing Fuel
NOTICE
Unsuitable fuels or lubricants or mix
ratios other than those specified may
result in serious damage to the engine.
Poor quality gasoline or engine oil may
damage the engine, sealing rings, hoses
and the fuel tank.
Gasoline
Use only high-quality brand-name
gasoline with a minimum octane rating
of 90 – leaded or unleaded.
If your machine is equipped with a
catalytic converter, you must use
unleaded gasoline.
NOTICE
A few tankfuls of leaded gasoline will
greatly reduce the efficiency of the
catalytic converter.
Gasoline with an ethanol content of
more than 10% can cause running
problems in engines with a manually
adjustable carburetor and should not be
used in such engines.
Engines equipped with M-Tronic deliver
full power when run on gasoline with an
ethanol content of up to 25% (E25).
Engine oil
Use only high-quality two-stroke engine
oil – preferably STIHL HP, HP Super or
HP Ultra, which are specially formulated
for use in STIHL engines. HP Ultra
guarantees high performance and a
long engine life.
These engine oils are not available in all
markets.
Use only STIHL 50:1 two-stroke engine
oil for the fuel mix in models with a
catalytic converter.
Mix Ratio
STIHL 50:1 two-stroke engine oil: 50
parts gasoline to 1 part oil
Examples
N Use a canister approved for storing
fuel. Pour oil into canister first, then
add gasoline and mix thoroughly.
Storing Fuel
Store fuel only in approved safety-type
fuel canisters in a dry, cool and safe
location protected from light and the sun.
Fuel mix ages – only mix sufficient fuel
for a few weeks work. Do not store fuel
mix for longer than 30 days. Exposure to
light, the sun, low or high temperatures
can quickly make the fuel mix unusable.
STIHL MotoMix may be stored for up to
2 years without any problems.
N Thoroughly shake the mixture in the
canister before fueling your
machine.
WARNING
Pressure may build up in the canister –
open it carefully.
N Clean the fuel tank and canister
from time to time.
Fuel
Gasoline STIHL engine oil 50:1
Liters Liters (ml)
1 0.02 (20)
5 0.10 (100)
10 0.20 (200)
15 0.30 (300)
20 0.40 (400)
25 0.50 (500)
HL 92, HL 92 K
English
13
Dispose of remaining fuel and cleaning
fluid properly in accordance with local
regulations and environmental
requirements.
Fuel filler cap
WARNING
When fueling on a slope, always position
the machine with the filler cap facing
uphill.
N Place the machine on level ground
so that the filler cap is facing up.
N Before fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
Open the tank cap.
N Turn the cap counterclockwise until
it can be removed from the tank
opening.
N Remove the cap.
Filling up with fuel
Take care not to spill fuel while fueling
and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
N Fill up with fuel.
Close the tank cap.
N Place the cap in the opening.
N Turn the cap clockwise as far as
stop and tighten it down as firmly as
possible by hand.
Fueling
HL 92, HL 92 K
English
14
Angle Adjuster - 145°
The angle of th cutter bar can be
adjusted upwards in 4 stages from 0°
(straight) to 55°, and downwards in 7
stages from to 90° (right angle facing
down). There are therefore 12 possible
working positions.
WARNING
To reduce the risk of injury, carry out the
adjustment only when the cutting blades
are at a standstill – engine at idle speed.
WARNING
The gearbox gets hot during operation.
To reduce the risk of burn injury, do not
touch the gearbox.
WARNING
To reduce the risk of injury, never touch
the blades while making adjustments.
N Pull back the sliding sleeve (1) and
use the lever (2) to adjust the joint
by one or several holes.
N Release the sliding sleeve (1) and
make sure the lock pin engages the
quadrant (3).
Transport Position
The cutter bar can be folded flat against
the drive tube and locked in position to
save space during transportation.
WARNING
To reduce the risk of injury, always shut
off the engine – depress stop switch –
and fit the blade scabbard before
moving the cutter bar to the transport
position or from the transport position to
the normal working position.
WARNING
The gearbox gets hot during operation.
To reduce the risk of burn injury, do not
touch the gearbox.
Adjusting the Cutter Bar
0000-GXX-1683-A0
145°
0000-GXX-1684-A0
3
2
1
0000-GXX-1685-A0
HL 92, HL 92 K
English
15
N Shut off the engine.
N Fit the blade scabbard.
N Pull back the sliding sleeve (1) and
use the lever (2) to swing the joint
upwards – in direction of drive tube
– until the cutter bar is flat against
the drive tube.
N Release the sliding sleeve (1) and
make sure the lock pin engages the
quadrant (3).
Some versions of the machine can be
carried on a shoulder strap.
The type and style of the shoulder strap
depend on the market.
Shoulder Strap
N Put on the shoulder strap (1).
N Adjust the length of the strap.
N With the power tool attached, the
carabiner (3) must be at about the
same height as your right hip.
Attaching Machine to Shoulder Strap
N Attach the carabiner (1) to the
carrying ring (2) on the drive tube –
hold the carrying ring steady.
Disconnecting Machine from Shoulder
Strap
N Press down the bar on the
carabiner (1) and pull the carrying
ring (2) out of the carabiner.
Throwing Off the Machine
WARNING
The machine must be quickly thrown off
in the event of imminent danger.
Practice removing and putting down the
machine as you would in an emergency.
To avoid damage, do not throw the
machine to the ground when practicing.
0000-GXX-1686-A0
1
2
3
Fitting the Harness
1
388BA037 KN
3
HL 92, HL 92 K
English
16
Practice quickly detaching the power
tool from the carabiner as described
under "Disconnecting Machine from
Shoulder Strap".
If you are using a shoulder strap:
Practice slipping the strap off your
shoulder.
Controls
1 Throttle trigger lockout
2 Throttle trigger
3 Stop switch with Run and Stop
positions. Depress the stop switch
() to switch off the ignition – see
"Function of stop switch and ignition
system".
4 Throttle set wheel – limits travel of
throttle trigger – see "Function of
throttle set wheel".
Function of stop switch and ignition
system
The ignition is switched off and the
engine stopped when the stop switch is
pressed. The stop switch returns
automatically to the Run position when it
is released: The ignition is switched on
again after the engine stops the engine
is then ready to start.
Function of throttle set wheel
The throttle set wheel (4) enables the
travel of the throttle trigger to be preset
anywhere between idle and full throttle.
Turn throttle set wheel (4) in
direction of to reduce throttle
trigger travel and maximum engine
speed.
Turn throttle set wheel (4) in
direction of + to increase throttle
trigger travel and maximum engine
speed.
It is possible to override the preset
stop and open the throttle wide by
pulling the throttle trigger firmly the
preset stop remains unaffected. The
original setting is restored when the
throttle trigger is released.
Starting / Stopping the
Engine
0208BA066 KN
2
1
4
3
HL 92, HL 92 K
English
17
Starting the Engine
N Press the manual fuel pump
bulb (5) at least five times – even if
the bulb is already filled with fuel.
Cold engine (cold start)
N Turn choke knob (6) and then push
it in at g
Also use this setting if the engine has
been running but is still cold.
Turn throttle set wheel in direction of
+ as far as stop.
Hot engine (hot start)
N Choke knob (6) remains in F
position.
Cranking
N Place the unit on the ground: It must
rest securely on the engine support
and the gearbox housing.
N On units with an adjustable cutter
bar and defined transport position:
Set the cutter bar to the straight (0°)
position.
N If fitted: Remove blade scabbard
from the cutting blades.
To reduce the risk of accidents, check
that the cutting blades are not touching
the ground of any other obstacles.
N Make sure you have a firm footing,
either standing, stooping or
kneeling.
N Hold the unit firmly on the ground
with your left hand and press down
– do not touch the throttle trigger,
lockout lever or stop switch.
NOTICE
Do not stand or kneel on the drive tube.
N Hold the starter grip with your right
hand.
Version without ErgoStart
N Pull the starter grip slowly until you
feel it engage and then give it a brisk
strong pull.
Version with ErgoStart (C-E)
N Pull the starter grip slowly and
steadily.
NOTICE
Do not pull out the starter rope all the
way – it might otherwise break.
N Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
N Continue cranking until the engine
runs.
As soon as the engine runs
At temperatures below +10°C
Warm up the engine for at least
10 seconds in position g.
At temperatures above +10°C
Warm up the engine for at least
5 seconds in position g.
5
0208BA029 KN
2.
1.
0208BA030 KN
6
1191BA015 KN
HL 92, HL 92 K
English
18
N Depress throttle trigger lockout and
pull the throttle trigger – the choke
knob moves to the Run F position.
Warm up a cold engineat varying
speeds.
WARNING
Make sure the carburetor is correctly
adjusted. The cutting blades must not
move when the engine is idling.
Your machine is now ready for
operation.
Stopping the Engine
N Depress the momentary contact
stop switch – the engine stops –
release the stop switch – it springs
back to the run position.
Other Hints on Starting
Engine stalls in cold start position g.
N Depress throttle trigger lockout and
pull the throttle trigger – the choke
knob moves to the Run F position.
N Continue cranking in position F until
the engine runs.
Running engine stalls in cold start
position g or under acceleration.
N Continue cranking in position F until
the engine runs.
If the engine does not start
N Check that all settings are correct.
N Check that there is fuel in the tank
and refuel if necessary.
N Check that the spark plug boot is
properly connected.
N Repeat the starting procedure.
Engine is flooded
N Move the choke knob to F and
continue cranking until the engine
runs.
Fuel tank run until completely dry
N After refueling, press the manual
fuel pump bulb at least five times –
even if the bulb is already filled with
fuel.
N Set the choke knob according to
engine temperature.
N Now start the engine.
During break-in period
A factory-new machine should not be
run at high revs (full throttle off load) for
the first three tank fillings. This avoids
unnecessary high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
engine are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
During Operation
After a long period of full throttle
operation, allow the engine to run for a
short while at idle speed so that engine
heat can be dissipated by the flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the
engine to cool down. Empty the fuel tank
and keep the machine in a dry place,
well away from sources of ignition, until
you need it again. For longer out-of-
service periods – see "Storing the
Machine".
1191BA025 KN
Operating Instructions
HL 92, HL 92 K
English
19
If there is a noticeable loss of engine
power
N Set knob for warm start (1) to g
N Turn screw (2) in filter cover (3)
counterclockwise until the cover is
loose
N Remove filter cover (3)
N Clean away loose dirt from around
the filter
N Grip into the recess (4) in the filter
housing and remove the felt filter (5)
N Replace felt filter (5) – as a
temporary measure you can knock it
out on the palm of you hand or blow
it out with compressed air – do not
wash
NOTICE
Replace any damaged parts!
N Insert felt filter (5) form-fittingly into
the filter housing
N Set knob for warm start (1) to g
N Fit filter cover (3) make sure not to
tilt the screw (2) – insert screw and
tighten
The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
Adjusting Idle Speed
Engine stops while idling
N Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly.
Cutting blades run when engine is idling
N Turn the idle speed screw (LA)
slowly counterclockwise until the
cutting blades stop running.
WARNING
If the cutting blades continue moving
when the engine is idling, have your
power tool checked and repaired by your
servicing dealer.
Cleaning the Air Filter
Adjusting the Carburetor
HL 92, HL 92 K
English
20
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the spark plug
N Turn screw (1) in cap (2) until cap
can be removed
N Lay down cap
N Unplug spark plug boot (3)
N Unscrew spark plug
Checking the Spark Plug
N Clean dirty spark plug.
N Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
Too much oil in fuel mix.
Dirty air filter.
Unfavorable running conditions.
WARNING
Arcing may occur if the adapter nut (1) is
loose or missing. Working in an easily
combustible or explosive atmosphere
may cause a fire or an explosion. This
can result result in serious injuries or
damage to property.
N Use resistor type spark plugs with a
properly tightened adapter nut.
Installing the Spark Plug
N Fit the spark plug and tighten it
down firmly.
N Press the boot firmly onto the spark
plug.
N Fit the cap (1), insert the screw (2)
and tighten it down firmly.
Spark Plug
1
0208BA037 KN
2
3
0208BA038 KN
000BA039 KN
A
1
000BA045 KN
HL 92, HL 92 K
English
21
Blade Drive Gear
Lubricate the blade drive gear with
STIHL gear lubricant for hedge trimmers
– see "Special Accessories".
HL 0° version
Adjustable HL 145° version
N Check the lubricant level at regular
intervals of about every 25 hours of
operation. Unscrew the filler
plug (1) – if no grease can be seen
on the inside of the filler plug, screw
the tube of grease into the filler hole.
N Squeeze up to 10 g (2/5 oz) grease
into the gearbox.
NOTICE
Do not completely fill the gearbox with
grease.
N Unscrew the tube of grease from the
filler hole.
N Refit the filler plug and tighten it
down firmly.
Angle Drive Gear
Lubricate the angle drive gear with
STIHL gear lubricant for hedge trimmers
(special accessory).
Adjustable HL 145° version
N Check the lubricant level at regular
intervals of about every 25 hours of
operation. Unscrew the filler
plug (2) – if no grease can be seen
on the inside of the filler plug, screw
the tube of grease into the filler hole.
N Squeeze up to 5 g (1/5 oz) grease
into the gearbox.
NOTICE
Do not completely fill the gearbox with
grease.
N Unscrew the tube of grease from the
filler hole.
N Refit the filler plug and tighten it
down firmly.
Lubricating the Gearbox
1
0000-GXX-1687-A0
1
0000-GXX-1688-A0
0000-GXX-1689-A0
2
HL 92, HL 92 K
English
22
When cutting performance and behavior
begin to deteriorate, i.e. blades
frequently snag on branches:
Resharpen the cutting blades.
It is best to have the cutting blades
resharpened by a dealer on a workshop
sharpener. STIHL recommends an
authorized STIHL servicing dealer.
It is also possible to use a flat crosscut
sharpening file. Hold the sharpening file
at the prescribed angle (see
"Specifications").
N Only sharpen the cutting edge.
N Always file towards the cutting
edge.
N The file only sharpens on the
forward stroke – lift it off the blade
on the backstroke.
N Use a whetstone to remove burr
from cutting edges.
N Remove as little material as
possible.
N After sharpening, clean away filing
or grinding dust and then spray the
cutting blades with STIHL resin
solvent.
NOTICE
Do not operate your machine with dull or
damaged cutting blades. This may
cause overload and will give
unsatisfactory cutting results.
For periods of about 3 months or longer
N Drain and clean the fuel tank in a
well ventilated area.
N Dispose of fuel properly in
accordance with local
environmental requirements.
N Run the engine until the carburetor
is dry – this helps prevent the
carburetor diaphragms sticking
together.
N Clean the cutting blades, check
condition and spray them with
STIHL resin solvent.
N Fit the blade scabbard.
N Thoroughly clean the machine.
N Store the machine in a dry and
secure location Keep out of the
reach of children and other
unauthorized persons.
Throttle Cable
Checking adjustment of throttle cable
Error: Engine speed increases when
only the throttle trigger is pulled.
N Start the engine.
N Pull the throttle trigger (1) – do not
press down the throttle trigger
lockout (2).
If the engine speed increases or if the
cutting blades run, the throttle cable has
to be adjusted.
N Shut off the engine.
N Have throttle cable adjusted by your
dealer. STIHL recommends an
authorized STIHL servicing dealer.
Sharpening Instructions Storing the Machine Inspection and Maintenance
by User
HL 92, HL 92 K
English
24
Maintenance and Care
The following intervals apply to normal operating conditions only. If your daily work-
ing time is longer or operating conditions are difficult (very dusty work area, etc.),
shorten the specified intervals accordingly.
before starting work
after finishing work or daily
after each refueling stop
weekly
monthly
every 12 months
if problem
if damaged
as required
Complete machine
Visual inspection (condition, leaks) XX
Clean X
Replace any damaged parts X
Control handle Check operation XX
Air filter
Visual inspection XX
Clean filter housing X
Replace felt filter
1)
XX
Fuel tank Clean XXX
Manual fuel pump (if fitted)
Check X
Have repaired by servicing dealer
2)
X
Pickup body in fuel tank
Have checked by servicing dealer
2)
X
Have replaced by servicing dealer
2)
XXX
Carburetor
Check idle setting, the cutting blades
must not move
XX
Adjust idle speed X
Spark plug
Adjust electrode gap X
Replace after every 100 operating hours
Cooling inlet
Visual inspection X
Clean X
Cylinder fins Have cleaned by servicing dealer
2)
X
Exhaust port
Have decoked by servicing dealer
2)
after
first 139 hours of operation, then every
150 hours of operation
X
All accessible screws and nuts (not adjust-
ing screws)
Retighten X
HL 92, HL 92 K
English
25
Anti-vibration elements
Visual inspection
3)
XXX
Have replaced by servicing dealer
2)
X
Cutting blades
Visual inspection XX
Clean
4)
X
Sharpen
4)
XX
Gearbox lubrication
Check X
Replenish X
Safety labels Replace X
1)
Only if there is a noticeable loss of engine power
2)
STIHL recommends an authorized STIHL servicing dealer.
3)
see chapter "Inspections and Maintenance by Dealer", section "Antivibration Elements"
4)
Spray with STIHL resin solvent after cleaning
The following intervals apply to normal operating conditions only. If your daily work-
ing time is longer or operating conditions are difficult (very dusty work area, etc.),
shorten the specified intervals accordingly.
before starting work
after finishing work or daily
after each refueling stop
weekly
monthly
every 12 months
if problem
if damaged
as required
HL 92, HL 92 K
English
26
Observing the instructions in this manual
helps reduce the risk of unnecessary
wear and damage to the power tool.
The power tool must be operated,
maintained and stored with the due care
and attention described in this owner's
manual.
The user is responsible for all damage
caused by non-observance of the safety
precautions, operating and maintenance
instructions in this manual. This includes
in particular:
Alterations or modifications to the
product not approved by STIHL.
Using tools or accessories which
are neither approved or suitable for
the product or are of a poor quality.
Using the product for purposes for
which it was not designed.
Using the product for sports or
competitive events.
Consequential damage caused by
continuing to use the product with
defective components.
Maintenance Work
All the operations described in the
"Maintenance Chart" must be performed
on a regular basis. If these maintenance
operations cannot be performed by the
owner, they should be performed by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
If these maintenance operations are not
carried out as specified, the user
assumes responsibility for any damage
that may occur. Among other parts, this
includes:
Damage to the engine due to
neglect or deficient maintenance
(e.g. air and fuel filters), incorrect
carburetor adjustment or
inadequate cleaning of cooling air
inlets (intake ports, cylinder fins).
Corrosion and other consequential
damage resulting from improper
storage.
Damage to the machine resulting
from the use of poor quality
replacement parts.
Parts Subject to Wear and Tear
Some parts of the power tool are subject
to normal wear and tear even during
regular operation in accordance with
instructions and, depending on the type
and duration of use, have to be replaced
in good time. Among other parts, this
includes:
Cutting blades
Clutch
Filters (air, fuel)
Rewind starter
Spark plug
Components of antivibration system
Minimize Wear and Avoid
Damage
HL 92, HL 92 K
English
27
1 Handle hose
2 Loop handle
3 Carrying ring
4 Stop switch
5 Throttle trigger lockout
6 Set wheel
7 Throttle trigger
8 Spark plug boot with cap
9 Air filter cover
10 Machine support
11 Manual fuel pump
12 Choke knob
13 Carburetor adjusting screw
14 Tank cap
15 Fuel tank
16 Starter grip
17 Muffler
18 Cutting blade
19 Blade drive gear
20 Drive tube
21 Angle drive
22 Sliding sleeve
23 Quadrant
24 Adjusting lever
25 Blade guard (scabbard)
# Serial Number
Main Parts
1
11
12
14
17
#
13
15
16
7
5
4
6
HL 92 K
8
9
10
7
5
4
6
2
3
1
HL 92, HL 94
18
19
20
22
21
23
24
19
25
0000-GXX-1690-A0
HL 92, HL 92 K
English
28
Engine
STIHL single cylinder two-stroke engine
Ignition System
Electronic magneto ignition
Fuel System
Weight
Cutting Blades
Noise and Vibration Data
Noise and vibration data are measured
at idling and maximum rated speed in a
ratio of 1:4.
For further details on compliance with
Vibration Directive 2002/44/EEC see
www.stihl.com/vib/
HL 0°, 500 mm / HL 0°, 600 mm /
HL 145°, 500 mm / HL 145°, 600 mm
The noise and vibration data of the
approved attachments are listed in the
instructions supplied with each
attachment.
The K-factor in accordance with
Directive 2006/42/EC is 2.5 dB(A) for
the sound pressure level and sound
power level; the K-factor in accordance
with Directive 2006/42/EC is 2.0 m/s
2
for the vibration measurement.
REACH
REACH is an EC regulation and stands
for the Registration, Evaluation,
Authorisation and Restriction of
Chemical substances.
For information on compliance with the
REACH regulation (EC) No. 1907/2006
see www.stihl.com/reach.
Specifications
Displacement: 21.4 cc
Bore: 33 mm
Stroke: 25 mm
Engine power to
ISO 8893:
0.9 kW (1 bhp) at
8,500 rpm
Idle speed: 2,800 rpm
Cut-off speed
(rated): 9,300 rpm
Spark plug (resistor
type): NGK CMR6H
Electrode gap: 0.5 mm
Fuel tank capacity: 540 cc (0.54 l)
Dry weight with 0° gearbox, 500 mm
HL 92: 5.5 kg
HL 92 K: 5.0 kg
Dry weight with 0° gearbox, 600 mm
HL 92: 5.6 kg
HL 92 K: 5.1 kg
Dry weight with 145° adjustable gear-
box, 500 mm
HL 92: 5.9 kg
HL 92 K: 5.3 kg
Dry weight with 145° adjustable gear-
box, 600 mm
HL 92: 6.0 kg
HL 92 K: 5.4 kg
Type: Double-edged for
bidirectional
cutting
Cutting length: 500 mm, 600 mm
Tooth spacing: 34 mm
Tooth height: 22 mm
Sharpening angle: 45° to horizontal
Sound pressure level L
p
to ISO 22868
HL 92: 91 dB(A)
HL 92 K: 92 dB(A)
Sound power level L
w
to ISO 22868
HL 92: 106 dB(A)
HL 92 K: 106 dB(A)
Vibration measurement a
hv,eq
to
ISO 22867:
HL 92, left hand on handle hose:
Handle hose: 4.1 m/s
2
Control handle: 4.5 m/s
2
Vibration measurement a
hv,eq
to
ISO 22867:
HL 92, left hand on loop handle:
Loop handle: 6.1 m/s
2
Control handle: 5.4 m/s
2
Vibration measurement a
hv,eq
to
ISO 22867:
HL 92 K:
Handle hose: 5.8 m/s
2
Control handle: 6.3 m/s
2
HL 92, HL 92 K
English
29
Users of this machine may only carry out
the maintenance and service work
described in this user manual. All other
repairs must be carried out by a
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
When repairing the machine, only use
replacement parts which have been
approved by STIHL for this power tool or
are technically identical. Only use high-
quality replacement parts in order to
avoid the risk of accidents and damage
to the machine.
STIHL recommends the use of original
STIHL replacement parts.
Original STIHL parts can be identified by
the STIHL part number, the {
logo and the STIHL parts symbol K
(the symbol may appear alone on small
parts).
Observe all country-specific waste
disposal rules and regulations.
STIHL products must not be thrown in
the garbage can. Take the product,
accessories and packaging to an
approved disposal site for environment-
friendly recycling.
Contact your STIHL servicing dealer for
the latest information on waste disposal.
ANDREAS STIHL AG & Co. KG
Badstr. 115
D-71336 Waiblingen
Germany
declare in exclusive responsibility that
the product
conforms to the provisions of Directives
2006/42/EC, 2014/30/EU and
2000/14/EC and has been developed
and manufactured in compliance with
the following standards in the versions
valid on the date of production:
EN ISO 10517, EN 55012,
EN 61000-6-1
The measured and guaranteed sound
power levels were determined according
to Directive 2000/14/EC, Annex V, using
the ISO 11094 standard.
Measured sound power level
Guaranteed sound power level
Technical documents deposited at:
Maintenance and Repairs Disposal
000BA073 KN
EC Declaration of Conformity
Category: Long reach
hedge trimmer
Make: STIHL
Model: HL 92
HL92K
Serial identification: 4243
Displacement
All HL 92 models: 21.4 cc
All HL 92 models: 101 dB(A)
all HL 92 K models: 101 dB(A)
All HL 92 models: 103 dB(A)
all HL 92 K models: 103 dB(A)
HL 92, HL 92 K
English
31
HL 92, HL 92 K
English
32
5


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