Older Onan Water Cooled 10 KW Gas Marine Generator ... Model is P2305 MDJ - C or F ... Has been in dry heated storage and ran well before going into storage. Most marine generators are 5 to 7 KWs so this one is a brute and will power up everything you want it to. I purchased it for a larger boat I no longer have. Comes complete including the water cooled exhaust/muffler. Unit measures 48 inches long, 35 inches high, 21 inches wide w/o muffler and 31 inches wide with the muffler which can easily be moved to aft. All fluids were drained after fogging for shipping and still has shipping tape on it.