SDMO Unstable Speed / Governor Hunting

SDMO generator frequency fluctuates under constant load; motors speed up and slow down.

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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.

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Possible Causes

Improper governor gain settings, Worn mechanical governor linkage, Air in fuel system causing uneven fueling, Faulty electronic governor actuator

How to Fix / Troubleshooting

Safety first: Keep clear of moving linkages while the engine is running. Use insulated tools when near live components.

  • Bleed fuel system: Remove any air from the SDMO fuel system to ensure consistent fueling.
  • Inspect governor linkage: Lubricate and free any sticking joints or pivots. Replace worn springs or link rods.
  • Adjust governor settings: Follow SDMO/engine manual to fine-tune governor gain and stability parameters. Make small adjustments and observe response.
  • Replace actuator if faulty: If the electronic actuator moves erratically or sticks, replace it with the correct SDMO-specified part.
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Repair Difficulty

Hard 4/5

Required Part

Electronic Governor Actuator
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