Note: To adjust the minimum RPM you will need a tachometer - see alternative methods. v section 9.
1. Start the engine, bring it to normal operating temperature and then turn it off.
2. Insert a 3.0 mm thick washer or feeler gauge between the feed lever and the minimum speed adjusting screw.
3. Turn the shut-off lever clockwise so that it moves away from the hole in the fast idle lever and insert a 3.0 mm diameter rod or drill bit.
4. Start the engine and let it idle, which should be 900±50 rpm.
5. If adjustment is necessary, loosen the lock nut, turn the minimum speed adjusting screw in the desired direction and tighten the lock nut again (see photo).
6. Remove the feeler gauge and drill and adjust the idle speed as indicated in section 9.
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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 RPM screw 1/4 turn counterclockwise (if you look from the flywheel side). When the revs drop too slowly (the engine brakes poorly), turn the screw 1/4 turn clockwise.
8. After completing the adjustment, tighten the lock nut and check the idle speed again (see section 9).
9. With the engine idling, check the operation of the manual shut-off device by turning the shut-off lever clockwise. The engine must stop immediately.
10. Turn off the ignition.