Cummins/Onan FM-JFE2 — Governor Adjustment
Adjustments
For the Cummins/Onan FM-JFE2, from the Cummins/Onan service manual.
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Procedure
- Insert screwdriver in slot in top of shaft and turn clockwise as far as it will go.
- With shaft held, adjust arm so center of hole in opposite end is 2-1/16 inch from cylinder casting.
- If throttle arm loosened, reset so center of hole in outer end is 1-1/2 inch from cylinder casting when butterfly valve closed.
- Set stop quadrant to not interfere with throttle.
- With engine at normal temperature and no load, turn stop screw until engine speed begins to increase; then turn counterclockwise about 1/4 turn.
- If hunting, change sensitivity adjusting stud; normally spring is about 1-3/8 inch from shoulder of governor arm.
Tools required
- screwdriver Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 2-1/16 inch from cylinder casting
- 1-1/2 inch from cylinder casting
- spring about 1-3/8 inch from shoulder
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.