Onan 300-2605 Engine Monitor PCB Assembly - Used

Onan 300-2605 Rev E PCB Assembly - Engine Monitor board, typically used in Onan MDL / MDKD-series marine and RV generator control systems. Underlying bare PCB is marked 300-2604 Rev D (board artwork number). Used, untested — sold as-is with no test evidence and no operational claim. 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.