Note: You will need a tachometer to adjust the minimum RPM - for alternative methods see section 9.
1. Start the engine, bring it to normal operating temperature and then turn it off.
2. Insert a 3.0 mm washer or feeler gauge between the feed lever and the minimum speed adjusting screw.
3. Rotate the shut-off lever clockwise until it is away from the hole in the fast idle lever and insert a 3.0 mm bar or drill.
4. Start the engine and leave it to idle, which should be equal to 900±50 rpm.
5. If adjustment is necessary, loosen the locknut, turn the minimum speed adjusting screw in the desired direction and tighten the locknut again (see photo).
6. Pull out the feeler gauge and drill and adjust the idle speed as indicated in section 9.
7. Turn the feed lever so that the engine speed increases to 3000 rpm and then quickly release it. If the rpm drops too quickly and the engine stalls, turn the minimum speed screw 1/4 turn counterclockwise (when viewed from the flywheel). If the RPM drops too slowly (engine slows down badly), turn the screw 1/4 turn clockwise.
8. After adjusting, tighten the lock nut and check the idle speed again (see section 9).
9. With the engine idling, test the operation of the manual shut-off device by turning the shut-off lever clockwise. The engine should stop immediately.
10. Turn off the ignition.