Generator is excessively loud or has new knocking/metallic noises
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Shut down the generator immediately if you hear loud knocking or metallic clanking. Turn OFF and open main breaker.
- Exhaust system: Inspect muffler, exhaust pipe, and mounting brackets for looseness or cracks. Tighten or replace as needed.
- Mounting hardware: Check engine and alternator mounting bolts for tightness.
- Fan and pulleys: Inspect cooling fan blades and pulleys for damage or wobble.
Deep knocking from the engine often indicates internal damage; do not run the unit and contact a Kohler service provider.
Repair Difficulty
Required Part
We may earn a commission from links on this page.