Adjust the Governor Droop

Updated 2 months ago by Juan Velez

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.
SAFETY PRECAUTIONS

  • To reduce the risk of injury, user must read and understand the operator’s manual before using this product.
  • DO NOT make any adjustments to the product without first stopping the engine and disconnecting the spark plug wire.
  • Burns from hot parts — let the engine cool completely before touching hot parts.
  • Injury from moving parts
  • To reduce the possibility of fire or explosion, be careful when working around gasoline. Keep cigarettes, sparks and flames away from all fuel‐related parts.
  1. Engine speed droop is different in RPM from high speed no load (HSNL) to 100% load where throttle is close to touching WOT stop.
  2. The main governor spring is normally in hole #5 to target 240 RPM (4 Hz) droop.
  3. The factory may set the spring in the other hole # to adjust for batch variation. 
  4. Governor may need to have droop reset for the following reasons:
    1. After many hours (300-500 hr.) of operation to compensate for wear. Droop usually gets wider with wear. 
    2. If the generator is experiencing wide speed droop from HSNL to 100% load.
    3. If the generator is experiencing speed instability/speed hunting due to tight droop. 
  5. If the engine has many hours on it (300-500 hr.), then reset the governor to WOT first. 
  6. To reset the governor droop do the following:
    1. To tighten the droop, move the governor spring closer to the governor shaft paddle pivot (a lower hole #). 
    2. To widen the droop, move the governor spring further away from the governor shaft paddle pivot (a higher hole #). 
    3. Reset the engine speed to 3750 RPM (62.5 Hz) HSNL.
  7. Check the running performance for droop and stability:
    1. If the droop is adjusted too tight, then you may encounter a no load speed hunting.
    2. Load the engine to 100% load; droop should be near 240±60 RPM (4±1 Hz).
    3. HSNL should be 2750 RPM (62.5 Hz), and mid-load operation should be near 3600 RPM (60 Hz).
    4. 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.


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