Cummins/Onan P2400 / P3500 — Governor Adjustments

Adjustments

For the Cummins/Onan P2400 / P3500, from the Cummins/Onan service manual.

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Procedure

1. Remove the fuel tank.
2. Loosen the nut on the governor arm pinch bolt.
3. Move the arm until the throttle is completely open, and hold it in that position.
4. Rotate the governor arm shaft as far as it will go in the same direction, then tighten the governor arm pinch bolt.
5. Check that the arm and throttle move smoothly.
6. Reinstall the fuel tank.
7. Start the engine and let it warm up; adjust the limiting screw to set the idle speed.

Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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