43026T2 Water Pump Impeller for OEM Mercury 75-115 Hp Optimax Outboards and 30-450 Hp 4-Stroke Outboards, and MerCruiser Alpha One Gen II/Vazer Sterndrives Delivers cooling water to your outboard engine. Impeller elastomers offer enhanced flexibility across a wide range of temperatures throughout the boating season. The center insert resists tearing to maintain performance. Engineered for durability to provide higher flow rates and cooling flow to protect your engine