Onan Cummins 305-0854-04 Generator Voltage Regulator - Used

Onan (Cummins Onan) generator voltage regulator, part number 305-0854-04 as read from the factory barcode label on the heat-sink. Features an 8-terminal FIELD / POWER / SENSE block with jumper positions, 50 Hz / 60 Hz selection, and a Volt Adj trim potentiometer on a finned aluminum heat-sink chassis.

Application: associated with Onan / Cummins Onan generator sets using the SR-style regulator. The specific generator model, spec, kW rating, voltage and phase are NOT verified — there is no genset data plate with this part.

Condition: used, untested take-out. The board is complete and intact with no visible burn damage, but it shows service grime, discoloration, heat-sink scratches and light oxidation on two terminal screws. No bench test, power-up, or load test has been performed, and no functional claim is made.

Quote is subject to final fitment confirmation by engine/transmission serial number, part number, photos, and supplier availability.

Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.