Tohatsu Outboard Motor Genuine Parts Impeller Water Pump 334-65021-0 2-Stroke: 1985 and up. 9.9 hp: M9.9 12 hp: M12 15 hp: M15 18 hp: M18 4-Stroke: 2004-2017 9.9 horsepower: MFS9.9 15 hp: MFS15 20 hp: MFS20