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Generac — Cleaning The Generator

For these Generac models: 13/13 kW, 15/16/18 kW, 15A, 6/7 kW, 9/10 kW, GT-990.

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Procedure

  1. Open the generator main circuit breaker. NO
  2. Disconnect all Wires 4 from the voltage regulator.
  3. Provide an external source to blow warm, dry air through
  4. Start the generator and let it run for 2 or 3 hours.
  5. Shut the generator down and repeat the stator and rotor

Source: manual:Generac Diagnostic Repair Manual 0G4338.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.