Adjust the Governor Droop
This bulletin covers the following Champion Power Equipment models: All Champion Power Equipment products instilled with a 717cc or 754cc engine.
Please read all the instructions completely before performing the service.
- Engine speed droop is different in RPM from high speed no load (HSNL) to 100% load where throttle is close to touching WOT stop.
- The main governor spring is normally in hole #5 to target 240 RPM (4 Hz) droop.
- The factory may set the spring in the other hole # to adjust for batch variation.
- Governor may need to have droop reset for the following reasons:
- After many hours (300-500 hr.) of operation to compensate for wear. Droop usually gets wider with wear.
- If the generator is experiencing wide speed droop from HSNL to 100% load.
- If the generator is experiencing speed instability/speed hunting due to tight droop.
- If the engine has many hours on it (300-500 hr.), then reset the governor to WOT first.
- To reset the governor droop do the following:
- To tighten the droop, move the governor spring closer to the governor shaft paddle pivot (a lower hole #).
- To widen the droop, move the governor spring further away from the governor shaft paddle pivot (a higher hole #).
- Reset the engine speed to 3750 RPM (62.5 Hz) HSNL.
- Check the running performance for droop and stability:
- If the droop is adjusted too tight, then you may encounter a no load speed hunting.
- Load the engine to 100% load; droop should be near 240±60 RPM (4±1 Hz).
- HSNL should be 2750 RPM (62.5 Hz), and mid-load operation should be near 3600 RPM (60 Hz).
- Flick the throttle or governor lever to upset the speed balance. The engine speed should recover and run steady within 8-10 seconds.
View and download the PDF version here.