Generac — Test 40 – Check / Adjust Governor (389/206/163cc Engines)
Adjustments · Engine governor
From a Generac service manual covering: GP1800, GP1850, GP3250, GP5000, GP5500, GP6500, GP7000, GP8000. Check it applies to your exact model before use.
Applies to: Generac GP1800, Generac GP3250, Generac GP5000, Generac GP5500, Generac GP6500, Generac GP7000, Generac GP8000, Generac OHVI engine
Before you start
- Do not apply excessive torque to the governor shaft.
Procedure
- Loosen the governor lever clamp bolt.
- Hold governor lever at full INC RPM; rotate governor shaft counterclockwise fully.
- Tighten governor lever clamp bolt to 110 inch-pounds.
- Turn speed adjustment screw counterclockwise three full turns.
- Start engine and let it warm up and stabilize at no-load.
- Connect frequency meter; set no-load frequency 62.0-62.5 hertz.
- Add a drop of Loctite 241 to the speed adjust screw threads.
Tools required
- frequency meter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 110 inch-pounds clamp bolt torque
- 62.0-62.5 hertz no-load frequency
Full service-parts list: Generac GP1800 →, Generac GP3250 →, Generac GP5000 →, Generac GP5500 →, Generac GP6500 →, Generac GP7000 →, Generac GP8000 →
Source: Generac 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.