MTU Onsite Energy Governor Hunting / Unstable Speed Control

Generator frequency drifts or hunts up and down with relatively constant load

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.

Possible Causes

Improper governor tuning, Sticky fuel rack or actuator, Air in fuel system, Worn governor components

Safety first: Avoid connecting sensitive loads while frequency is unstable.

Fuel system check: Ensure fuel filters are clean and there is no air in the fuel lines.
Actuator inspection: Observe the electronic actuator or mechanical linkage for smooth movement. Lubricate or repair binding linkages.
Governor tuning: Have an MTU technician adjust governor gain, stability, and droop parameters to eliminate hunting.
Load test: After adjustments, test under various loads to confirm stable frequency.

Hard 4/5

Electronic Governor Actuator

Check Price on Amazon

We may earn a commission from links on this page.