McCulloch MAC 738 Chainsaw User Manual


 
15
Wrong
Squared O
f
f
Corner
Too Much Hook
A
ngle
WARNING: Maintain the proper hook
angle according to the manufacturer’s specifi-
cations for the chain you are using. Improper
hook angle will increase the chance of kick-
back which can result in serious injury.
4. Check and lower depth gauges.
Depth Gauge Tool
Depth Gauge
File
S Place gauge tool on cutter.
S If the depth gauge is higher than the
depthgaugetool,fileitleveltothetopof
the depth gauge tool.
S Maintain rounded front corner of
depth gauge with a flat file.
NOTE: The very top of the depth
gauge should be flat with the front
half rounded off with aflat file.
If you require further assistance or are unsure
about performing this procedure, contact your
authorized service dealer .
CARBURETOR ADJUSTMENT
WARNING: The chain will be moving
during most of this procedure. Wear your pro-
tective equipment and observe all safety pre-
cautions. The chain must not move at idle
speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if
you notice any of the following conditions:
S Chain moves atidle. See IDLE SPEED--T
adjusting procedure.
S Saw willnot idle. See IDLESPEED--T ad-
justing procedure.
Idle Speed-- T
Allow engineto idle. If thechain moves, idle
istoofast. Iftheenginestalls,idleis tooslow.
Adjustspeeduntil engineruns withoutchain
movement (idle too f ast) or stalling (idle too
slow). Theidlespeedscrewis locatedinthe
area above the prim er bulb andis labeled T.
S T urn idle speed screw (T) clockwise t oin-
crease engine speed.
S T urn idle speed screw (T) counterclock-
wise to decrease engine speed.
STORAGE
WARNING:Stopengineandallowto
cool, and secure the unit before storing or
transporting in a vehicle. Store unit and fuel
in an area where fuel vapors cannot reach
sparks or open flames from water heaters,
electric motors or switches, furnaces, etc.
Storeunitwithallguardsinplace.Positionso
that any sharp object cannot accidentally
cause injury to passersby. Store the unit out
of reach of children.
S Before storing, drain all fuel from the unit.
Start engineand allow torun untilit stops.
S Clean the unitbefore storing. Pay particu-
larattention tothe air intake area, keeping
it free of debris. Use a mild detergent and
sponge to clean the plastic surfaces.
S Donotstoretheunitorfuelinaclosedarea
where fuel vapors can reach sparks or an
openflamefromhotwaterheaters,electric
motors or switches, furnaces, etc.
S Store in adry area outof thereach ofchil-
dren.
S Ensure the machine is cleaned and thata
complete service is carried out before
long--term storage.
S The guide bar and chain must always be
covered with a scabbard when the machine
is being transported or in storage in order to
prevent accident contact with the sharp
chain. Even a non--moving chain can cause
serious cuts to yourself or persons you
bump into with an exposed chain.
CAUTION: It is important to prevent
gum deposits from forming in essential fuel
system parts such as thecarburetor, fuelfil-
ter, fuelhose, or fueltank during storage.Al-
cohol blendedfuels (calledgasohol or using
ethanol or methanol) can attract moisture
which leads to fuel mixture separation and
formationofacidsduringstorage. Acidicgas
can damage the engine.