Mercury outboard 5 horsepower propane (better for the environment). Uses propane tank (same as for a grill). Short shaft. Used once for 3 hours. Too heavy (59.5 lbs) for the small aluminum skiff I bought it for. Purchased new in late summer 2021 for $1905. Used only in fresh water. Runs perfectly. Cash only. My mistake is your gain. If you see this listed, it is still available.