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100641 - ChAiNSAw
Tab
Knob
air filter
cover
Figure 41
air filter
air intake
Figure 42
Adjusting the idle Speed
The saw chain may spin during idle speed adjustments.
Wear protective gloves and clothing and observe all safety
instructions to prevent serious personal injury.
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 chainsaw to a Champion or
other qualified service dealer:
Slot
mounting post
wARNiNG
NOTiCE
– The engine will not idle.
– The engine hesitates or stalls on acceleration.
– There is a loss of engine power.
Maintaining the Spark Plug
1. Stop the engine and allow it to cool.
2. Turn the knob on the air filter cover counterclockwise to
loosen the air filter cover (Fig. 41).
3. Remove the air filter cover (Fig. 41).
4. Grasp the spark plug boot firmly and pull it from the spark
plug (Fig. 44).
5. Clean around the spark plug. Remove the spark plug from the
cylinder head with the multi-purpose tool or a 5/8-inch socket
wrench, turning counterclockwise.
Do not sand blast, scrape or clean spark plug electrodes. Grit
in the engine could damage the cylinder.
6. Inspect the spark plug. If the spark plug is cracked, fouled
or dirty, replace it with a Champion RCJ7Y or Bosch L8RTF
Spark Plug
7. Use a feeler gauge to set the air gap at 0.026 in. (0.65 mm)
(Fig. 45).
8. Install the spark plug in the cylinder head. Tighten the spark
plug with the multi-purpose tool or a 5/8-inch socket wrench,
turning it clockwise until snug.
If using a torque wrench, torque to: 110-120 in.•lb.
(12.4-13.5 N•m). Do not over tighten.
9. Reattach the spark plug boot.
10. Place the air filter cover back onto the chainsaw. Insert
the tab on the air filter cover into the slot on the chain saw
housing (Fig. 41).
29
MAiNTENANCE
Idle speed screw
Figure 43
wARNiNG
NOTiCE
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