Engine speed overshoot or overspeed shutdown; ECU logs high RPM; generator trips offline.

Safety: Overspeed can cause catastrophic mechanical failure. Do not bypass overspeed protection.

• Check mechanical linkage: Inspect the fuel control linkage or throttle actuator on the Volvo Penta engine for binding, corrosion, or misadjustment. Lubricate and free any sticking joints.
• Inspect speed sensor: Locate the engine speed sensor (often on the flywheel housing). Check for metal debris on the sensor tip and clean carefully. Ensure correct air gap per Volvo Penta spec.
• Verify governor settings: Using the generator controller or ECU diagnostics, confirm rated speed and overspeed setpoints are correct. Do not alter factory overspeed limits.
• Simulate load changes: If overspeed occurs on sudden load rejection, consult the generator controller manual to adjust ramp-down or droop settings. Persistent overspeed requires professional governor calibration.