Carburetor Adjustment; Fuel Filter; Air Filter - Efco 147 Instruction Manual

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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 carbure-
tor adjustment.
This engine is designed and manufactured in order to comply with
EPA (Environmental Protection Agency) Phase 1 regulations.
The carburetor is factory set and should not require adjusting.
The carburetor will permit only limited adjustment of the "L" (Low
85
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 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.
86
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

Check the fuel filter (F, Fig. 88) periodically. Replace it if contami-
87
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.
Completely loosen the air filter cover knob (G, Fig. 89) by turning
counterclockwise, remove air filter cover (H) and check the air fil-
ter (I) each day; shake the filter and clean with a soft brush. If hea-
88
vily contaminated, clean with soapy water, rinse and dry thorou-
ghly prior to installing. Reinstall the air filter into cover. Place the
air filter cover onto the chain saw. Tighten the air filter cover knob
securely.
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.
89