English

Carburetor adjustment (Fig. 31)

24

Fig. 30

For models with an engine ignition switch, keep the ignition switch pressed until the engine comes to a complete stop.

WARNING

A cutting attachment can injure while it continues to spin after the engine is stopped or power control is released. When the unit is turned off, make sure the cutting attachment has stopped before the unit is set down.

Semi-auto cutting head

○When cutting, operate engine at over 6,500 rpm. Extended time of use at low rpm may wear out the clutch prematurely.

○Cut grass from right to left.

○Cut grass from left to right (only curve shaft model).

WARNING

A cutting attachment can injure while it continues to spin after the engine is stopped or power control is released. When the unit is turned off, make sure the cutting attachment has stopped before the unit is set down.

Automatically feeds more nylon cutting line when it is tapped at low rpm (not greater than 4,500 rpm).

MAINTENANCE

MAINTENANCE, REPLACEMENT OR REPAIR OF THE EMISSION CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED BY ANY NON- ROAD ENGINE REPAIR ESTABLISHMENT OR INDIVIDUAL.

Fig. 31

WARNING

●The cutting attachment may be spinning during carburetor adjustments.

●Never start the engine without the complete clutch cover and tube assembled! Otherwise the clutch can come loose and cause personal injuries.

In the carburetor, fuel is mixed with air. When the engine is test run at the factory, the carburetor is basically adjusted. A further adjustment may be required, according to climate and altitude. The carburetor has one adjustment possibility:

T = Idle speed adjustment screw.

Idle speed adjustment (T)

Check that the air filter is clean. When the idle speed is correct, the cutting attachment will not rotate. If adjustment is required, close (clockwise) the T-screw, with the engine running, until the cutting attachment starts to rotate. Open (counter- clockwise) the screw until the cutting attachment stops. You have reached the correct idle speed when the engine runs smoothly in all positions well below the rpm when the cutting attachment starts to rotate.

If the cutting attachment still rotates after idle speed adjustment, contact your Hitachi dealer.

NOTE

Standard Idle rpm is 2,800 – 3,200 rpm.

WARNING

When the engine is idling the cutting attachment must under no circumstances rotate.

14