HOW TO ADJUST CARBURETOR

Carburetor Adjustment

    Warm up the engine before setting the engine idle speed and make the idle adjustment with the pilot air screw and throttle stop screw.

                                                            1) Air screw

                                                     2) Throttle stop screw

1. Adjust the throttle stop screw to give idle speed of 1,200 rpm. Use a tachometer when it is available.
2. Turn the pilot air screw in and out to locate the position where engine rpm is highest. Turning the screw in will provide a rich fuel mixture, turning the screw out will give a lean fuel mixture.
3. If engine rpm has increased by the adjustment of air screw, the engine rpm should be set to the proper idle speed by using the throttle stop screw.
4. Turn the pilot air screw in or out within the range of 1/8 to 1/4 turn to obtain the optium idling condition.