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MAINTENANCE
Carburetor Adjustment
Before adjusting the carburetor, clean the starter cover vents as
shown in Fig. 87, and air filter as shown in Fig. 88, refer to
Operation-Starting Unit and Maintenance-Air Filter Sections for
details. Allow the engine to warm up prior to carburetor adjust-
ment.
This engine is designed and manufactured in order to comply with
CARB (California Air Resources Board) and EPA (Environmental
Protection Agency) regulations.
The carburetor is factory set and should not require adjusting.
Exhaust Emission Control System includes ignition system, air
inlet system and carburetor.
The carburetor will permit only limited adjustment of the
“L” (Low
Jet) and
“H” (High Jet) needles (within 1/4 of turn Fig. 89). Any
adjustment should be done by a Servicing Dealer.
Under no circumstances should the
“L” (Low Jet) and (H) (High
Jet) needles be forced outside the range of adjustment.
WARNING: Serious damage can occur to the engine
if improper adjustments are made to the “L” and “H”
needles. Do not force the “L” and “H” needles outside
the adjustment range in such case the engine will not
run in compliance with emissions regulations.
Idle Speed Adjustment
• If the engine starts, runs, and accelerates but will not idle; turn
the idle speed screw
“T” clockwise to increase idle speed (Fig. 89).
• If the chain turns at idle, turn the idle speed screw
“T”
counterclockwise to reduce the idle RPM and stop the chain
movement. If the saw chain still moves at idle speed, contact a
Servicing Dealer for adjustment and discontinue use until the
repair is made.
Fuel Filter
Check the fuel filter (F, Fig. 90) periodically. Replace it if contami-
nated or damaged.
Air Filter
WARNING: Do not clean filter in gasoline or other
flammable solvent to avoid creating a fire hazard or
producing harmful evaporative emissions.
Rotate the knob (G, Fig. 91) counterclockwise, remove air filter
cover
(H) and check the air filter (I) each day; shake the filter and
clean with a soft brush. If heavily contaminated, clean with soapy
water, rinse and dry thoroughly prior to installing. Reinstall the air
filter into cover. Place the air filter cover onto the chain saw, rota-
te knob to latch air filter cover into place.
A used air filter can never be completely cleaned. It is advisable to
replace your air filter with a new one after six month of operation.
CAUTION: Never run the engine without the air filter,
serious damage could result.
Make sure the air filter is correctly placed in the air
filter cover before reassembly.
Always replace damaged filters.
Do not clean a filter with a brush.
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