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100647 - ChAiNSAw
Maintaining the Air filter
To avoid serious personal injury, always stop the engine and
allow it to cool before cleaning or maintaining the unit.
Failure to maintain the air filter can result in poor performance or
can cause permanent damage to the engine. Engine failure due
to improper air filter maintenance is not covered by the product
warranty.
Cleaning the air Filter
1. Turn the knob on the air filter cover counter-clockwise to
loosen the air filter cover (Fig. 41).
2. Remove the air filter cover (Fig. 41).
3. Remove the air filter (Fig. 42).
4. Wash the air filter in mild detergent and water. Rinse the air
filter thoroughly and allow it to dry.
5. Reinstall the air filter onto the mounting post (Fig. 42). Make
sure the opening in the air filter sits securely in the air intake
(Fig. 42).
6. Place the air filter cover back onto the unit. Insert the tab on
the air filter cover into the slot on the chain saw housing
(Fig. 41).
7. Turn the knob clockwise to tighten the air filter cover
securely.
Tab
Knob
air filter
cover
Figure 41
air filter
air intake
Figure 42
wARNiNG
Slot
mounting post
Adjusting the idle Speed
The saw chain may spin during idle speed adjustments. Wear
protective clothing and observe all safety instructions to
prevent serious personal injury.
Careless adjustments can seriously damage the unit.
A Champion or other qualified service dealer should make
carburetor adjustments.
If, after checking the fuel and cleaning the air filter, the engine still
will not idle, adjust the idle speed screw as follows:
1. Start the engine. Refer to Starting and Stopping.
2. Release the throttle control and let the engine idle.
2a. If the engine stops, use a small Phillips or flat-head
screwdriver to turn the idle speed screw clockwise, 1/8
of a turn at a time (as needed) until the engine idles
smoothly (Fig. 43).
2b. If the engine idles too quickly, turn the idle speed screw
counterclockwise, 1/8 of a turn at a time (as needed) to
reduce the idle speed (Fig. 43).
The saw chain should not spin when the engine idles. If it
does, reduce the idle speed until the saw chain stops moving.
Checking the fuel, cleaning the air filter, and adjusting the idle
speed should solve most engine problems. If not, and any of the
following conditions are true, take the unit to a Champion or other
qualified service dealer:
– The engine will not idle.
– The engine hesitates or stalls on acceleration.
– There is a loss of engine power.
Figure 43
MAiNTENANCE
wARNiNG
NOTiCE
NOTiCE
Idle speed screw
28
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