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Carburetor Adjustment
Engine Break-In
New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be
made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can
be adjusted as required.
High Altitude Operation
This engine has been factory adjusted to maintain satisfactory starting, emission, and durability performance up to
1,100 feet above sea level (ASL) (96.0 kPa). To maintain proper engine operation and emission compliance above
1,100 feet ASL the carburetor may need to be adjusted by an authorized ECHO service dealer.
If the engine is adjusted for operation above 1,100 feet ASL, the carburetor
must be re-adjusted when operating the engine below 1,100 feet ASL, oth-
erwise severe engine damage may result.
Every unit is run at the factory and the carburetor is set in compliance with
emission regulations. Carburetor adjustments, other than idle speed, must be
performed by an authorized Shindaiwa dealer.
Adjusting engine idle
The engine must return to idle speed whenever the throttle lever is released.
Idle speed is adjustable, and must be set low enough to permit the engine
clutch to disengage the cutting attachment.
WARNING!
The cutters must NEVER engage at engine idle speeds! If the idle
speed cannot be adjusted by the procedure, described here, contact your
authorized Shindaiwa servicing dealer.
Idle Speed Adjustment
1.
Place the trimmer on the ground, then start the engine, and then allow it to
idle 2-3 minutes until warm.
2.
If the attachment rotates when the engine is at idle, reduce the idle speed
by turning the idle adjustment screw counter-clockwise.
If a tachometer is available, the engine idle speed should be final adjusted
3.
to the values in the Specification section.
Carburetor fuel mixture adjustments are preset at factory and cannot be ser-
viced in the field.
16
IMPORTANT!
NOTE:
NOTE:
Idle adjustment
screw
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