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MAINTENANCE
Carburetor Adjustment
Before adjusting the carburetor, clean the starter cover vents as
shown in Illustration Fig. 85, and air filter as shown in Illustration
Fig. 86, refer to Operation-Starting Unit and Maintenance-Air
Filter Sections for details. Allow the engine to warm up prior to
carburetor adjustment.
This engine is designed and manufactured in order to comply
with EPA (Environmental Protection Agency) Phase 3 regulations.
The carburetor is factory set and should not require adjusting.
The carburetor will permit only limited adjustment of the "L" (Low
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Jet) and "H" (High Jet) needles (Fig. 87). 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 ad justments 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.
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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. 87).
• 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
87
Check the fuel filter (F, Fig. 88) periodically. Replace it if
contaminated 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.
Unclip the cover fasteners (A, Fig.89A), undo the air cleaner
screws (D, Fig.89A) and check air cleaner (B) on a daily basis.
Open air cleaner (B) by means of the two tabs (E, Fig.89B). Clean
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with degreaser, rinse with water and blast dry with compressed
air, not too close, blowing from the inside outwards. Renew the
filter if heavily clogged or damaged.
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.
Always replace damaged filters.
Do not clean a filter with a brush.
89A
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