Is your Mercruiser Alpha One Gen 1 or MR stern drive overheating or losing water pressure? This complete water pump repair kit from TITAN 757 PERFORMANCE is likely the fix. It includes the impeller, housing, base, gaskets, and seals – everything you need to rebuild the lower unit's water pump. Directly replaces Mercruiser part numbers 46-57234A8 and 46-96148Q8. Regular impeller replacement is key to preventing engine damage from overheating. This kit makes the job straightforward. Comes with a warranty. A must-have for boat owners and mechanics performing annual maintenance or repairs. Keep your Mercruiser cooling efficiently and reliably with this high-quality kit.