Generator runs but is excessively noisy compared to normal operation.

Safety first: Turn OFF the generator and allow it to cool. Exhaust components and engine surfaces can be very hot.

• Inspect exhaust system: Check the Lifan muffler, exhaust pipe, and joints for cracks, holes, or loose clamps. Tighten mounting bolts and replace the muffler or exhaust gasket if damaged.
• Check flex coupling: If equipped, inspect the exhaust flex section for splits or fraying. Replace the exhaust flex coupling if leaking.
• Engine mounts: Inspect rubber engine mounts for cracking or separation. Replace worn engine mounts to reduce vibration and noise.
• Alternator and frame bolts: Tighten all visible mounting bolts on the alternator, engine, and base frame. Loose hardware can cause rattling and drumming noises.