Honeywell Unstable engine speed at light load

Generator runs rough, surges, or hunts at no load

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Dirty carburetor or throttle body, Vacuum leak at intake manifold, Faulty governor adjustment, Contaminated fuel supply

How to Fix / Troubleshooting

Safety first: Turn OFF the generator and shut off gas before working on the fuel system. Allow hot parts to cool.

Steps:

  • Air filter: Replace a dirty air filter to ensure proper airflow.
  • Inspect intake: Check for loose clamps or cracked hoses between air filter, throttle body, and intake manifold. Tighten or replace as needed.
  • Clean throttle body: Remove the intake duct and clean the throttle plate and bore with appropriate cleaner (engine off). Avoid spraying directly into sensors.
  • Fuel quality: For LP, ensure tank is not near empty and regulator is functioning. For NG, verify stable supply pressure.
  • Governor linkage: Clean and lubricate linkage pivots lightly to prevent sticking.
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Repair Difficulty

Medium 3/5

Required Part

Carburetor / Throttle Body
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