Operating Your Unit; Before Starting Engine - McCulloch M4620 Instruction Manual

Tighten Loosen
chain chain
Adjusting Wheel
3. Use a screwdriver to move chain around
guide bar to ensure all links are in bar
groove.
4. While lifting tip of guide bar, tighten bar
knob securely (clockwise). Hand tight-
en only!

OPERATING YOUR UNIT

BEFORE STARTING ENGINE

WARNING
: Be sure to read the fuel
information in the safety rules before you be-
gin. If you do not understand the safety rules,
do not attempt to fuel your unit. Contact an
authorized service dealer.
BAR AND CHAIN LUBRICATION
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 of oil will quickly ruin the bar and
chain. Too little oil will cause overheating
shown by smoke coming from the chain and/
or discoloration of the bar.
Only use Bar and Chain Oil for bar and chain
lubrication.
Oil Cap
5. Push lever on bar knob down to return le-
ver to closed/locked position.
WARNING
bar knob down to closed/locked position
could result in serious personal injury or
damage to your chain saw.
6. Use a screwdriver to move chain around
guide bar.
7. If chain does not rotate, it is too tight.
Loosen bar knob 1 turn (counterclock-
wise); then, loosen chain by turning the
adjusting wheel
tion). Retighten bar knob.
8. If chain is too loose, it will sag below the
guide bar. DO NOT operate the saw if the
chain is loose.
WARNING
with a loose chain, the chain could jump off
the guide bar and result in serious injury.
WARNING
and after use. Do not touch the muffler or al-
low combustible material such as dry grass
or fuel to do so.
TIGHTEN
FUELING ENGINE
WARNING
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 oil with 5 liters of unleaded gasoline. DO
NOT USE automotive or boat oil. These oils
will cause engine damage. When mixing fuel
follow the instructions printed on the container.
Always read and follow the safety rules relating
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
Fuel mix cap
to separation and formation of acids during
storage. Acidic gas can damage the fuel sys-
tem of an engine while in storage. To avoid
engine problems, empty the fuel system be-
fore storage for 30 days or longer. Drain the
gas tank, start the engine and let it run until
the fuel lines and carburetor are empty. Use
fresh fuel next season. Never use engine or
carburetor cleaner products in the fuel tank
or permanent damage may occur.
8
: Failure to push lever on
1
/ turn (upward direc-
4
: If the saw is operated
: Muffler is very hot during
: Remove fuel cap slowly