Kohler — Governor Adjustment
Adjustments · Electronic governor
From a Kohler service manual covering: 10C, 10CC, 10CFC, 10CFZ, 12C, 12CFC, 12CFZ, 40CZ, CZ/12-Lead. Check it applies to your exact model before use.
Applies to: Kohler 10C, Kohler 12C, Ford VSG-411 (10 kW) / VSG-413 (12 kW) engine
Before you start
- Do not tamper with -2.5 Hz/Freq terminals during governor adjustment.
Procedure
- Verify swivel on actuator arm fully threaded and secured.
- Adjust throttle rod to approx. 3-7/8 in. (98 mm) between ball joints.
- For 50 Hz install jumper across 50/60 Hz terminals; for 60 Hz no jumper.
- Install jumper across Gain Change terminals; set gain pot to 3.
- Start set, apply full load; adjust gain until actuator stable.
- Check battery voltage at governor board + and - terminals: at least 11 V DC.
- Check AC voltage at Gen Volt terminal: at least 90 V AC.
- If needed, lengthen actuator rod linkage one turn.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Throttle rod 3-7/8 in. (98 mm)
- Battery at least 11 V DC
- AC at least 90 V AC
- Natural gas pressure at least 5 in. water column
Full service-parts list: Kohler 12C →
Source: Kohler 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.