Operating Engine - Gasoline 4500 Owner's Manual

7. OPERA TING ENGINE
CHECKING
SUPPLY
After starting the engine, run
the chain at medium speed
and see if chain oil is scattered
off as shown in
figure.(F13)
(1)Chain oil
The chain oil flow can be

7.OPERATING ENGINE

4. Turn idle adjusting screw
(T) counterclockwise
changed by The carburetor on your unit has been
inserting a factory adjusted. But may require fine
screwdriver in turning due to change in operating
the hole on conditions.
bottom of the
clutch side. Before adjusting the carburetor, make
Adjust sure that provided are clean air/fuel
according to filters and fresh, properly mixed fuel.
your work When adjusting, take the following
conditions
(F14)
（ （ （ （ 1） ） ） ） Adjuste
r carburetor with the bar chain attached
1. Stop engine and screw in both H
The oil tan k
should become
nearly empty by
the time fuel is H needle: 1±3/8
OIL used up. Be sure L needle: 1
to refill the oil
tank every time 2. Start engine and allow it to warm
when refueling
the unit.
the 3. Turn L needle slowly clockwise to
ADJUSTI
NGCARB
URETOR
(R15)
that caw
chain does Operating
not turn. If temperatures of 0-5°at times of high
idling speed humidity may result in ice forming
is too slow. within the carburetor, and this in turn
Turn the May cause the output power of the
screw engine to be reduced or for the engine
clockwise. to fail to operate smoothly.
5. Make a test This product has accordingly been
cut and designed with a ventilation hatch the
adjust the H back of the air cleaner cover to allow
needle for warm air to be supplied to the engine
best cutting and to thereby prevent icing from
power, not occurring.
for
maximum Under
speed. product should be used in normal
(1) L needle operating mode, i.e., in the mode to
(2) H needle which it is set at the time of shipment
(3) Idle however when the possibility exists that
adjusting icing may occur. The unit should be set
screw to operate in anti-freeze mode before
CARBURE use.
TOR
ANTI-FRE
EZE
MACHANI 1.
so 2.
steps:
NOTE
NOTE
Be sure to adjust the
and L needles until they stop.
Never force. Then set them back
the initial number of turns as
shown below.
3
/4±1/4
up at half-throttle.
find a position where idling speed
is maximum. then set the needle
back a quarter(1/4)
counterclockwise.
SM
the chain saw
normal circumstance
HOW TO SWITCH BETWEEN
OPERATING MODES(F16)
Flip the engine switch to turn off
the engine.
Remove the air cleaner cover
turn
in
the