Onan 300-2604 Engine Monitor PCB Assembly - Used

Onan 300-2604 Rev E Engine Monitor PCB Assembly — used take-off from an Onan generator set. Application: Onan genset engine monitor / control board with dual Aromat relays and screw-terminal I/O for start/stop/status signals. Condition: Used, untested, sold as-is with visible dirt, flux, and light corrosion on terminal hardware. 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.