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MAINTENANCE
Carburetor Adjustment
_t BE CAREFUL! The chain will be moving during this
procedure
1 Stop the engine
2 Remove the carburetor cover (Figure 7) Turn the high
speed (Figure 8) and low speed mixture screws
clockwise _ (Figure 8) until they stop Don't tighten
them, you may damage the needle seats!
3. Turn the high speed and low speed mixture screws one full
turn counterclockwise
4 Start the engine If it stops, increase the idle speed !Figure
8) by turning the idle speed screw clockwise _ , Keep
dirt and sawdust away from the carburetor while the cover
is removed,
5, Run the engine for a few minutes to bring it up to
operating temperature
6 Set the idle speed as fast as possible without the chain
moving Turn the idle speed screw clockwise _=_ for
faster idle. counterclockwise _ for slower idle
7 Squeeze the trigger quickly If the engine stops, restart it
The engine should accelerate without hesitating when the
trigger is squeezed If it does not, turn the tow speed
mixture screw counterclockwise _ 1/16 of a turn and
check the acceleration again If the idle speed slows while
adjusting the low speed mixture, reset the idle speed as in
step 6 Continue step 7 until acceleration is smooth
8 Make a test cut with the saw (keep sawdust out of the
carburetor!)
9 If the engine seems to smoke excessively in the cut, turn
the high speed mixture screw clockwise _ 1/16 of a
turn Repeat step 8 and 9, if necessary WARNING: The
high speed needle must never be less than 7/8 turn open
Too lean of a setting will quickly ruin the engine
10 If the engine seems to weaken or lose power in the
cut, turn the high speed mixture screw counterclock-
wise _ 1/16 of a turn at a time until the saw cuts
smoothly The high speed mixture screw should not be
open more than tY& turns (counterclockwise _ )
from the stopped position in step 2
11 Reset the idle speed (see step 6)
Replacing carburetor cover
_' Incorrect placement of the cover will prevent the choke
from working
t Move the choke knob a[t the way in the choke direction
2 Move the choke shutter to the choke closed position (See
Figure 8)
3 Place the cover on the saw and tighten the screws
4 Check the operation of the choke If the knob sticks or
won't move, remove the cover and repeat the procedure
above
Air Filter
Clean the air filter after every t0 tanks of gas or every
5 hours of operation.
1 Remove the carburetor cover and pull out the filter
(Figure 9)
2 DO NOT clean your filter in gasoline or other flammable
solvent Blow the dirt off with compressed air or wash
filter in soap and water
3. Replace the filter and carburetor cover
I /
Choke Closed
High Speed
Mix Screw
Idle Speed
Screw
Low Speed
Mix Screw
Air Filter
Figure 7
Figure 8
Figure 9
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