Cummins/Onan 3.6MKY / 4MKY — Carburetor Throttle Stop Screw Adjustment
Adjustments
For the Cummins/Onan 3.6MKY / 4MKY, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 3.6MKY, Cummins/Onan 4MKY
Procedure
- Connect a frequency meter and run the genset until warmed up.
- Disconnect all loads.
- Pull the governor linkage toward the front so the throttle lever tang bears against the throttle stop screw.
- Adjust the stop screw to obtain 54-56 Hz on 60 Hz gensets (44-46 Hz on 50 Hz gensets).
Tools required
- Frequency meter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 54-56 Hz (60 Hz)
- 44-46 Hz (50 Hz)
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.