Maintenance And Care - Echo HC-331ES Operator's Manual

Carburettor adjustment (As required)
When carburettor adjustment is completed, cutter blade should not move at idle, otherwise serious personal injury may
result.
When starting, idle speed adjuster (T) should be adjusted not to move the cutter blade.
When there is some trouble with the carburettor, contact your ECHO DEALER.
T: Idle speed adjuster
Cleaning cylinder fins (Check periodically)
1. Recoil starter housing
2. Cylinder fins
WARNING
CAUTION
3. Exhaust guide
4. Silencer cover

Maintenance and care

Every unit is test run at the factory and the carburettor is fine
tuned for maximum performance.
Before adjusting carburettor, clean or replace air filter, start en-
gine and run several minutes to bring it to operating temperature.
1. Idle Speed Adjustment.
Start engine and turn idle speed adjustment screw (T) clock-
wise until the blades begin to move, then turn the screw (T)
anticlockwise until the blades stop moving. Turn screw (T)
anticlockwise an additional 1/2 turn.
2. Accelerate to full throttle for 2 to 3 seconds to clear excess
fuel from engine then return to idle. Accelerate to full throttle
to check for smooth transition from idle to full throttle.
1. Of the bolts fixing the exhaust guide, take out the (M6) bolt
on silencer side and loosen the (M4) bolt on the exhaust port
side.
2. Remove the silencer cover.
3. Carefully remove the recoil starter housing and clean dirt
and dust from fins.
4. Reinstall the recoil starter housing and the silencer cover.
5. Put the exhaust guide back in place and tighten two bolts.
NOTE
Clogged fins will cause poor engine cooling.
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