Generator is excessively noisy during operation compared to normal

Safety first: Keep hands and tools away from moving parts while the generator is running. Wear hearing protection.

• Step 1 – Identify noise source: Carefully walk around the unit while it is running and listen for the loudest area (engine, alternator, exhaust, or enclosure).
• Step 2 – Check mounts and fasteners: Shut down the generator. Inspect engine and alternator mounting bolts and rubber isolators. Tighten loose bolts and replace cracked isolators.
• Step 3 – Inspect exhaust system: Look for cracks in the exhaust manifold, muffler, or flex pipe. Replace damaged components and ensure all hangers are secure.
• Step 4 – Tighten enclosure panels: Tighten loose screws and latches on doors and panels. Add rubber grommets or anti‑vibration pads where needed.
• Step 5 – Bearing noise: If a grinding or whining noise persists from the alternator, its bearings may be failing and should be replaced by a technician.