Turn the "STOP" lever clockwise until a 3 mm diameter pin can be inserted into the hole in the levers (arrow in Fig. 2E.45).
Turn the minimum portion adjustment bolt to adjust the engine speed to 900±100 rpm.
Remove the 4mm thick plate and 3mm diameter pin.
By turning the idle speed adjustment bolt (see Fig. 2E.46) set the engine speed to 850±50 rpm.
Increase the engine speed to the maximum value, then release the acceleration lever on the fuel pump and check the time it takes for the speed to decrease from maximum to idle (maximum 5 seconds). If the speed decreases too much or the engine stops, then proceed as follows.
If the engine stalls, back out the minimum portion adjustment bolt a quarter turn (turn counterclockwise looking from behind the fuel pump) and repeat the measurement of the idle speed reduction time.
If the decrease time exceeds 5 seconds, then screw in the minimum portion adjustment bolt (turn clockwise looking from the rear of the fuel pump) and repeat the measurement of the idle speed decrease time.
Caution: Do not turn the bolt more than a quarter turn in either direction.