RedactedNarrative: Operator stated that he was cruising slowly at about 1500 rpms. He was running the boat before winterizing it. He was on the flying bridge when he smelled smoke. He looked down the side of the boat where the engine compartment vents exhaust and saw smoke coming out. He shut the engine down and flames started coming out so he got the boat close to the bank and jumped in and swam to the bank where he was picked up by me. Operator stated that the boat had not been used since august.