Boat owners, this JSProxam water pump kit is exactly what you need for maintaining your Mercury or Mercruiser engine! This is a direct replacement for OEM part FK1204-1 and also works with KMS part number 710-FK1204-1. If you're dealing with overheating issues or it's just time for routine maintenance, this kit has everything required for a complete water pump service. The quality is impressive - all components are manufactured to meet or exceed original specifications, ensuring reliable performance and proper fit. Installation is straightforward if you're mechanically inclined, though having a service manual handy doesn't hurt. I've used this on my Mercruiser 5.7L and the difference in water pressure was immediately noticeable. The kit includes the impeller, housing, gaskets, and seals - all the essentials for a professional-grade repair. What I appreciate is how affordable this is compared to buying directly from the dealer, without sacrificing quality. The materials are designed to withstand marine environments, resisting corrosion and wear from continuous water exposure. Whether you're a professional marine mechanic or a boat owner doing your own maintenance, this kit delivers reliable performance that will keep your engine running cool and efficient. Always double-check your specific engine model and existing part numbers before ordering, but for Mercury and Mercruiser owners needing FK1204-1, this is a solid choice that won't let you down. Keep your engine from overheating and avoid costly damage with this reliable water pump replacement!