Generator vibrates excessively, causing the enclosure to shake and nearby structures to rattle.

Safety first: Turn OFF the generator and disconnect the battery negative cable. Do not place hands near moving parts while the engine is running.

• Check mounting bolts: Inspect and tighten all bolts securing the generator set to its concrete pad or mounting rails.
• Inspect engine mounts: Look for torn or compressed rubber mounts between the engine/alternator and frame. Replace any failed vibration isolators.
• Check for loose components: Ensure the muffler, heat shields, and control panel are firmly attached and not resonating.
• Rotor balance (advanced): If vibration persists and appears to come from the alternator, the rotor may be out of balance or the coupling misaligned. This requires professional balancing or alternator service.