Cummins/Onan — Engine speed adjustment (CFP83 F-10, F-20, F-30)
Adjustments · Fuel pump
From a Cummins/Onan owner's manual covering: CFP-015, CFP11E, CFP15E, CFP23E, CFP30E, CFP50, CFP59, CFP5E, CFP60E, CFP7E, CFP83, CFP83-F10…. Check it applies to your exact model before use.
Applies to: Cummins/Onan CFP23E, Cummins/Onan CFP83-F10, Cummins/Onan CFP83 engine
Before you start
- The maximum engine speed should only be altered by a Cummins technician.
Procedure
- Start the engine.
- Observe that the engine accelerates to the currently adjusted speed setpoint.
- Locate the threaded linkage rod on the fuel pump side of the engine.
- Loosen the locking nuts against the stops on the threaded rod.
- To increase speed, turn the bolt on the right side of the throttle bracket clockwise.
- To decrease speed, turn the bolt counter-clockwise.
- When the rated speed is correct, tighten the locking nut against the stop.
- Adjust the left-side threaded bolt for maximum speed if needed.
- Stop the engine and repeat until the desired speed is attained.
Specs & values
- Crank termination setpoint factory-set at 600 RPM
Full service-parts list: Cummins/Onan CFP23E →, Cummins/Onan CFP83-F10 →
Source: Cummins/Onan owner's 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.