McCulloch M4620 - OPERATING YOUR UNIT; Pre-Operation Checks; Fueling the Engine

8
Adjusting
wheel
Bar knob
Screwdriver
Guide bar
Adjusting the tension:
Chain tension is very important. Chain
stretches during use. This is especially true
during the first few times you use your saw.
Always check chain tension each time you
use and refuel your saw.
1. Lift lever on bar knob and turn counter-
clockwise 1 ½ -- 2 turns to loosen clutch
cover.
LOOSEN
2. Turn adjusting wheel (downward direc-
tion) to tension chain until chain solidly
contacts bottom of guide bar rail. Lift tip
of guide bar while adjusting tension.
Tighten
chain
Adjusting Wheel
Loosen
chain
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!
TIGHTEN
5. Push lever on barknob downto returnle-
ver to closed/locked position.
WARNING: Failure to push lever on
bar knob down to closed/locked position
could result in serious personal injury or
damage to your chain saw.
6. Use a screwdriver tomove chainaround
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
1
/
4
turn (upward direc-
tion). Retighten bar knob.
8. If chain is too loose, it will sag below the
guidebar.DO NOT operate thesaw if the
chain is loose.
WARNING: If the saw is operated
with a loose chain, the chain could jump off
the guide bar and result in serious injury.
WARNING: Muffler is very hot during
and after use. Do not touch the muffler or al-
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
information in the safety rules before you be-
gin. If you donot understandthe 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
Fuel mix cap
FUELING ENGINE
WARNING: Remove fuel cap slowly
when refueling.
This engine is certified to operate on un-
leaded petrol. Before operation, petrol 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 mix-