Maintenance (continued)

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 Shindaiwa service dealer.

IMPORTANT!

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, otherwise severe engine damage may result.

NOTE:

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 trigger 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 cutters move when the engine is at idle, reduce the idle speed by turn- ing the idle adjustment screw counter-clockwise.

3.If a tachometer is available, the engine idle speed should be final adjusted to the values in the Specification section.

NOTE:

Carburetor fuel mixture adjustments are preset at factory and cannot be serviced in the field.

Idle adjustment

screw

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