Winter Rebuild

Buzz Box Tech


How to Set a Magneto Using a Buzz Box

1. Rotate crankshaft until desired amount of ignition timing is lined with timing pointer.

2. Find out where #1 cylinder segment is in the cap and mark on outside of generator case with marker.

3. Find out where last cylinder segment in firing order is in cap and mark on outside of generator case.

4. Line up all intermediate oil pump drives and gear drive so as to place the rotor approximately Ĺ the way between #1 cylinder segment and the last segment in the firing order when the ignition is firmly seated on the manifold or block surface.

5. At this time you should check the play between the intermediate shaft and the ignition or the block and the thrust face on the gear. Some play or clearance must be present. If not when you tighten your ignition down you might be jacking your oil pump gear thought the bottom plate of your pump.

6. Just snug up the bolt/nut on the retaining retainer so you can move the ignition with a slight amount of resistance

7. Hook up the buzzer to the orange & yellow primary wires and turn it on. The buzzer may be buzzing now or it may notónot to worry at this time.

8. Determine which way the rotor rotates and hold back against it with your thumb, applying a few ounces of pressure.

9. Turn the outside case of the ignition against the rotation until the buzzer just stops. You might have to do this 2-3 times to get the feel of it, but the mag will fire just as the buzzer stops (this is when the point opens).

10. Tighten up the ignition clamp bolt/nut until the ignition will not turn.

11. To check if youíre right there in the ball park ignition wise, reach up and grasp the rotor and turn it the way you did before. It should buzz when back pressure is applied to rotor; and quit buzzing with reduction of pressure.


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