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TAKING CARE OF UNEXPECTED PROBLEMS TECHNICAL INFORMATION
ENGINE WILL
NOT START
Possible Cause Correction Serial Number Location
Carburetor Modifications for High Altitude Operation
ENGINE LACKS
POWER
Possible Cause Correction
SERIAL NUMBE R &
ENGINE TYPE
Record the engine serial
number in the space below. You
will need this information when
ordering parts and when
making technical or warranty
inquiries.
Engine serial number: __ __ __ __ __ __ __ __ __ __ __
Date Purchased: ______ / ______ / ______
At high altitude, the standard carburetor air-fuel mixture will be
excessively rich. Performance will decrease, and fuel consumption
will increase.
High altitude performance can be improved by specific
modifications to the carburetor. If you always operate your engine
at altitudes above 1,500 meters, have your servicing dealer
perform this carburetor modification.
Even with carburetor modification, engine horsepower will
decrease about 3.5% for each 300 meters increase in altitude. The
effect of altitude on horsepower will be greater than this if no
carburetor modification is made.
Operation of the engine at an altitude lower than the carburetor is
jetted for may result in reduced performance, overheating, and
serious engine damage caused by an excessively lean air/fuel
mixture.
Fuel valve OFF.
Choke open
(applicable
types).
Control lever is
not in proper
position
(applicable
types).
Flywheel brake
lever in
ENGAGED
position
(applicable
types).
Out of fuel.
Bad fuel; engine
stored without
treating or
draining
gasoline, or
refueled with
bad gasoline.
Spark plug faulty,
fouled, or
improperly
gapped.
Spark plug wet
with fuel
(flooded engine).
Fuel filter
restricted,
carburetor
malfunction,
ignition
malfunction,
valves stuck, etc.
Move lever to ON
position.
Move lever to
CLOSED position
unless the engine
is warm.
Move lever to
proper position.
Move lever to
RELEASED
position.
Refuel (p. 4).
Drain fuel tank and
carburetor (p. 6).
Refuel with fresh
gasoline (p. 4).
Gap or replace
spark plug (p. 6).
Dry and reinstall
spark plug.
Replace or repair
faulty components
as necessary.
Check control
positions.
Check fuel.
Remove and
inspect spark
plug.
Take engine to
an authorized
Honda
servicing
dealer, or refer
to shop
manual.
Check air filter.
Check fuel.
Take engine to
an authorized
Honda
servicing
dealer, or refer
to shop
manual.
Filter element
restricted.
Bad fuel; engine
stored without
treating or
draining
gasoline, or
refueled with
bad gasoline.
Fuel filter
restricted,
carburetor
malfunction,
ignition
malfunction,
valves stuck, etc.
Clean or replace
filter element
(p. 5).
Drain fuel tank and
carburetor (p. 6).
Refuel with fresh
gasoline (p. 4).
Replace or repair
faulty components
as necessary.
Engine type: ___ ___ ___ ___
1.
2.
3.
4.
1.
2.
3.
TRANSPORTINGStorage Precautions
Removal from Storage
If the engine has been running, allow it to cool for at least 15
minutes before loading the engine-powered equipment on the
transport vehicle. A hot engine and exhaust system can burn you
and can ignite some materials.
Keep the engine level when transporting to reduce the possibility
of fuel leakage. Turn the fuel valve lever to the OFF position (see
page ).
If the cylinder was coated with oil during storage preparation, the
engine will smoke briefly at startup. This is normal.
If the fuel was drained during storage preparation, fill the tank with
fresh gasoline. If you keep a container of gasoline for refueling, be
sure it contains only fresh gasoline. Gasoline oxidizes and
deteriorates over time, causing hard starting.
Check your engine as described in the
BEFORE OPERATION
CHECKS
section of this manual (see page ).
With the engine and exhaust system cool, cover the engine to
keep out dust. A hot engine and exhaust system can ignite or melt
some materials. Do not use sheet plastic as a dust cover.
A nonporous cover will trap moisture around the engine,
promoting rust and corrosion.
Keep the engine level in storage. Tilting can cause fuel or oil
leakage.
If possible, avoid storage areas with high humidity, because that
promotes rust and corrosion.
If your engine will be stored with gasoline in the fuel tank and
carburetor, it is important to reduce the hazard of gasoline vapor
ignition. Select a well ventilated storage area away from any
appliance that operates with a flame, such as a furnace, water
heater, or clothes dryer. Also avoid any area with a spark-
producing electric motor, or where power tools are operated.
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