McCulloch 442 Chainsaw User Manual


 
8
NOTE: If chain brake detaches from saw ,
see T O REPLACE CHAIN BRAKE section.
Adjustment
Knob
Handle
Tensioning Lever
LOOSEN
5. While lifting tip o f guide bar , turn adjust-
ment knob handle clockwise to clamp
bar. Tightenuntilbaris clampedsecure-
ly. Hand tighten securely; do not use
tools to tighten!
6. Using chain adjustment tool (bar tool),
roll chain around guide bar to ensure all
links are in bar groove.
7. Return adjustment knob handle to original
position. Ensure teeth of adjustment knob
handle are engaged with notches in the
chain brake and adjustment knob handle
is laying flat.
WARNING: If the saw is operated
with a loose chain, the chain could jump off
the guide bar and result in serious injury.
WARNING:Mufflerisvery hotduring
andafter use. Donot touchthe muffleroral-
low combustible material such as dry grass
or fuel to do so.
OPERATING YOUR UNIT
BEFORE STARTING ENGINE
WARNING: Be sure to read the fuel
informationinthesafety rules before yoube-
gin.Ifyoudonotunderstandthesafetyrules,
do not attempt to fuel your unit. Contact an
authorized service dealer.
BAR AND CHAIN LUB RICATION
The bar and chain require continuous lubri-
cation. Lubrication is provided by the auto-
matic oiler system when the oil tank is kept
filled. Lack ofoil will quickly ruin the bar and
chain. Too little oil will cause overheating
shownbysmokecomingfromthechainand/
or discoloration of the bar.
OnlyuseBarandChainOilforbarandchain
lubrication.
Oil Cap
Fuel mix cap
FUELING ENGINE
WARNING: Remove fuel cap slowly
when refueling.
This engine is certified to operate on unleaded
gasoline. Before operation, gasoline must be
mixed with a good quality 2-cycle air-cooled
engine oil designed to be mixed at a ratio of
40:1. A 40:1 ratio is obtained by mixing 0,125
liter of oilwith5 liters of unleaded gasoline. DO
NOT USE automotive or boat oil. These oils
will cause engine damage. When mixing fuel
follow the instructions printed o n the container .
Always readand follow thesafety rulesrelating
to fuel before fueling your unit.
IMPORTANT
Experience indicates that alcohol blended
fuels (called gasohol or using ethanol or
methanol) can attract moisture which leads
to separation and formation of acids during
storage.Acidicgascandamagethefuelsys-
tem of an engine while in storage. To avoid
engine problems, empty thefuel systembe-
fore storage for 30 days or longer. Drain the
gas tank, start the engine and let it run until
the fuel lines and carburetor areempty. Use
fresh fuel next season. Never u se engine or
carburetor cleaner products in the fuel tank
or permanent damage may occur.
CHAIN BRAKE
Ensure chain brake is disengaged by pulling
thefront handguardback towardthe fronthan-
dle as far as possible. The chain brake must
be disengaged before cutting with the saw.
WARNING: The chain must not
move when the engine runs at idle speed. If
the chain moves at idlespeed refer toCAR-
BURETOR ADJUSTMENT within this
manual.Avoid contact with themuffler. Ahot
muffler can cause serious burns.
To stop the engine, move the ON/STOP
switch to the STOP position.
To start the engine, hold the saw firmly on
the ground as illustrated below. Make sure
the chain is free to turn without contacting
any object.
Hold saw firmly while pulling starter rope.
Use only 40 --- 45 cm o
f
rope per pull.