From a parted out marine generator. Runs great. Oil samples came back good. No blowby. Only 600 hours. Was in a late 80's Onan 4kw generator. Electrical side failed but engine runs great and would make an excellent sailboat engine. Closed cooling system w/good heat exchanger. Engine is a Kubota D650 14.5hp@2800rpm. This engine spent its whole life at 1800rpm and was well maintained. Parts readily available. Will sell complete Onan MDKC 4.0 as-is for $800 but alternator side is only good for scrap. Sitting on a pallet in a pickup truck ready to slide into your truck. Delivery possible if forklift or engine hoist available on site.