Manual McCulloch Mac742 (page 10 of 17) (English, German, French, Spanish)

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DIFFICULT STARTING (or starting a

flooded engine)

The engine may be flooded with too much

fuel if it has not started after 10 pulls.

Flooded engines can be cleared of excess

fuel by pushing the choke/fast idle lever in

completely (to the OFF CHOKE position)

and then following the warm engine starting

procedure listed above. Ensure the ON/

STOP switch is in the ON position.

Starting could require pulling the starter rope

handle many times depending on how badly

the unit is flooded. If engine fails to start, re-

fer to the TROUBLESHOOTING TABLE.

CHAIN BRAKE

WARNING: If the brake band is worn

too thin it may break when the chain brake is

triggered. With a broken brake band, the chain

brake will not stop the chain. The chain brake

should be replaced by an authorized service

dealer if any part is worn to less than 0,02″ (0,5

mm) thick. Repairs on a chain brake should be

made by an authorized service dealer . Take

your unit to the place of purchase if purchased

from a servicing dealer , or to the nearest autho-

rized master service dealer .

S This saw is equipped with a chain brake.

The brake is designed to stop the chain if

kickback occurs.

S The inertia activated chain brake is activated

if the front hand guard is pushed forward, ei-

ther manually or by centrifugal force.

S If the brake is already activated, it is disen-

gaged by pulling thefront handgu ard back

toward the front handle as far as possible.

S When cutting with the saw,the chain brake

must be disengaged.

Engaged

Disengaged

Braking function control

CAUTION:

The chain brake must be

checked several times daily. The engine

must berunningwhenperforming this proce-

dure. This is the only instance when the saw

should be placed on the ground with the en-

gine running.

Place the saw on firm ground. Grip the rear

handlewithyour righthand andthe fronthan-

dle with your left hand. Apply full throttle by

fully de pressing the throttle trigger. Activate

the chain brake by turning your left wrist

against the hand guard without releasing

your grip around the front handle. The chain

should stop immediately.

Inertia activating function control

WARNING: When performing the fol-

lowing procedure, the engine must be turned

off.

Grip the rear handle with your right hand and

the front handle with your left hand. Hold the

chain saw approximately 35 cm above a

stump or other wooden surface. Release

your grip on the front handle and use the

weight of the saw to let the top of the guide

bar fall forward and contact the stump.

When the tip of the bar hits the stump, the

brake should activate.

CUTTING METHODS

IMPORTANT POINTS

S Check chain tension before first use and af-

ter 1 minute of operation. See CHAIN TEN-

SION in the ASSEMBLY section.

S Cut wood only. Do not cut metal, plastics,

masonry , n on-wood b uildin g mat erials, etc.

S The bumper spike may be used as a pivot

when making a cut.

S Stop the saw if the chain strikes a foreign

object. Inspect thesaw andrepair parts as

necessary.

S Keepthe chainoutofdirtand sand. Evena

small amount of dirt will quickly dull achain

and increase the possibility of kickback.

S Practice cutting a few small logs using the

following techniques to get the “feel” of us-

ing your saw before you begin a major

sawing op eration.

S Squeeze the throttle trigger and allow the

engine to reach full speed before cutting.

S Begin cutting with the saw frame

against the log.

S Keep the engine at full speed the entire

time you are cutting.

S Allowthechain tocutfor you. Exert only

light downward pressure.

S Release the throttle trigger as soon as

the cut is completed, allowing the en-

gine to idle. If you run the saw at full

throttle without a cutting load,unneces-

sary wear can occur.

S To avoid losing control when cut is com-

plete, do not put pressure on saw at end

of cut.

S Stop the engine before setting the saw down.

TREE FELLING TECHNIQUES

WARNING: Felling a tree requires

chain saw skills and experience. Inexperi-

enced users should not fell trees. Do not at-

tempt any task that makes you feel un com-

fortable or unsure.

WARNING:Do notcut nearbuildings

or electrical wires if you do not know the di-

rection of tree fall, at night since you will not

be able to see well, or during bad weather

such as rain, snow, or strong winds. as fall is

unpredictable.

Carefully plan your sawing operation in ad-

vance. You need a clear area all around the

tree so you can have secure footing. Check

for broken or dead branches which can fall

on you causing serious injury.

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McCulloch Mac742 Manual

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