{"title":"Yamaha 40MJHT-PUM (1995) Parts \u0026 Diagrams","description":"\u003cp\u003eOEM and aftermarket replacement parts for Yamaha 40MJHT-PUM. Scroll down for exploded parts diagrams (7), specifications, and maintenance reference.\u003c\/p\u003e","products":[{"product_id":"water-pump-impeller-kit-for-yamaha-25-to-70-hp-663-44311-02","title":"Water Pump Impeller Kit – Fits Yamaha 25-70 HP (Replaces 663-44311-02)","description":"\u003ch2\u003eWater Pump Impeller Kit – Fits Yamaha 25-70 HP (Replaces 663-44311-02)\u003c\/h2\u003e\n\u003cp\u003eThis water pump impeller service kit is designed for a wide range of Yamaha 2-stroke and 4-stroke outboard engines, from 25 HP to 70 HP. It provides the necessary components for repairing or rebuilding the engine's water pump, a critical part of the cooling system.\u003c\/p\u003e\n\u003cp\u003eThis assembly is a direct replacement for multiple Yamaha and aftermarket part numbers, ensuring broad compatibility with various models produced between 1984 and 2000.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation Method:\u003c\/strong\u003e Drop-in replacement for the original water pump assembly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuality Manufacturing:\u003c\/strong\u003e Produced in an ISO9002 certified facility to meet or exceed OEM specifications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete Kit:\u003c\/strong\u003e Includes a new impeller, housing insert, gaskets, plate, and bolts required for a full service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n        \u003cthead\u003e\n            \u003ctr\u003e\n                \u003cth\u003eBrand\u003c\/th\u003e\n                \u003cth\u003ePart Number\u003c\/th\u003e\n            \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e663-44311-00\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02-00\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e663-44311-0200\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e663-W0078-A0-00\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e663W0078A000\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e6H4-W0078-A0-00\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e6H4W0078A000\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e6J8-44311-00\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e6J84431100\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eSierra\u003c\/td\u003e\n                \u003ctd\u003e18-3408\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n                \u003ctd\u003e46-81416T\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eAftermarket\u003c\/td\u003e\n                \u003ctd\u003eAM663-44311-02\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eAftermarket\u003c\/td\u003e\n                \u003ctd\u003eMAL9-43255\u003c\/td\u003e\n            \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eYamaha 2-Stroke Engines\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n        \u003cthead\u003e\n            \u003ctr\u003e\n                \u003cth\u003eBrand\u003c\/th\u003e\n                \u003cth\u003eModel\u003c\/th\u003e\n                \u003cth\u003eRated HP\u003c\/th\u003e\n                \u003cth\u003eStroke\u003c\/th\u003e\n                \u003cth\u003eYears\u003c\/th\u003e\n                \u003cth\u003eOEM Part No.\u003c\/th\u003e\n                \u003cth\u003eNotes\u003c\/th\u003e\n            \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e25B\/BETO\u003c\/td\u003e\n                \u003ctd\u003e25\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e40N\/H\/E\u003c\/td\u003e\n                \u003ctd\u003e40\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e40\u003c\/td\u003e\n                \u003ctd\u003e40\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1984–1994\u003c\/td\u003e\n                \u003ctd\u003e6H4-W0078-00\u003c\/td\u003e\n                \u003ctd\u003e6H4 code models\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e48\u003c\/td\u003e\n                \u003ctd\u003e48\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1995–2000\u003c\/td\u003e\n                \u003ctd\u003e6H4-W0078-00\u003c\/td\u003e\n                \u003ctd\u003e6H4 code models\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e50G\/GEO\/GETO\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e50D\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1984–1994\u003c\/td\u003e\n                \u003ctd\u003e6H4-W0078-00\u003c\/td\u003e\n                \u003ctd\u003e6H4 code models\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e55B\/BET\u003c\/td\u003e\n                \u003ctd\u003e55\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003eE55CMH\u003c\/td\u003e\n                \u003ctd\u003e55\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003eC55\u003c\/td\u003e\n                \u003ctd\u003e55\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1990–1995\u003c\/td\u003e\n                \u003ctd\u003e663-W0078-A0, 670-W0078-A0\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003eCV55\u003c\/td\u003e\n                \u003ctd\u003e55\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1989\u003c\/td\u003e\n                \u003ctd\u003e663-W0078-A0\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e55\u003c\/td\u003e\n                \u003ctd\u003e55\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1989–1995\u003c\/td\u003e\n                \u003ctd\u003e6H4-W0078-00\u003c\/td\u003e\n                \u003ctd\u003e6H4 code models\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e60FEO\/FETO\/FEDO\u003c\/td\u003e\n                \u003ctd\u003e60\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e60BE\/BEM\/BET\u003c\/td\u003e\n                \u003ctd\u003e60\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e70CE\u003c\/td\u003e\n                \u003ctd\u003e70\u003c\/td\u003e\n                \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eYamaha 4-Stroke Engines\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n        \u003cthead\u003e\n            \u003ctr\u003e\n                \u003cth\u003eBrand\u003c\/th\u003e\n                \u003cth\u003eModel\u003c\/th\u003e\n                \u003cth\u003eRated HP\u003c\/th\u003e\n                \u003cth\u003eStroke\u003c\/th\u003e\n                \u003cth\u003eYears\u003c\/th\u003e\n                \u003cth\u003eOEM Part No.\u003c\/th\u003e\n                \u003cth\u003eNotes\u003c\/th\u003e\n            \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e55C\u003c\/td\u003e\n                \u003ctd\u003e55\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e1990\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e60C\u003c\/td\u003e\n                \u003ctd\u003e60\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n                \u003ctd\u003e663-44311-02\u003c\/td\u003e\n                \u003ctd\u003e\u003c\/td\u003e\n            \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eSpecification\u003c\/th\u003e\n            \u003cth\u003eValue\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eWater Pump Impeller Kit\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eDrop-in replacement\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eOther Technical Attributes\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eISO9002 certified manufacturing\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e1 x Water Pump Gasket (\u003cstrong\u003e663-44315-A0-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e1 x Cartridge Insert (\u003cstrong\u003e663-44322-00-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e1 x Cartridge Outer Plate (\u003cstrong\u003e663-44323-00-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e1 x Cartridge Gasket (\u003cstrong\u003e663-44324-A0-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e1 x Water Seal Damper 2 (\u003cstrong\u003e663-44366-00-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller (\u003cstrong\u003e6H3-44352-00-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e1 x Woodruff Key (\u003cstrong\u003e90280-03024-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e2 x Bolts (\u003cstrong\u003e97095-08045-00\u003c\/strong\u003e)\u003c\/li\u003e\n    \u003cli\u003e2 x Bolts (\u003cstrong\u003e97095-08055-00\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety First:\u003c\/strong\u003e Disconnect the engine's battery and ensure the engine is off and cool.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAccess the Pump:\u003c\/strong\u003e Remove the lower unit (gearcase) from the outboard motor by unbolting it.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDisassemble Housing:\u003c\/strong\u003e Carefully unbolt and remove the water pump housing to expose the old impeller.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNote Old Impeller:\u003c\/strong\u003e Pay close attention to the orientation of the impeller vanes before removing it.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClean \u0026amp; Inspect:\u003c\/strong\u003e Thoroughly clean the inside of the pump housing and inspect it for any cracks, scoring, or warping.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstall New Components:\u003c\/strong\u003e Install the new gaskets, plate, and impeller from the kit. Ensure the impeller vanes are oriented correctly (typically clockwise).\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReassemble Pump:\u003c\/strong\u003e Securely fasten the water pump housing, tightening the bolts to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReinstall Lower Unit:\u003c\/strong\u003e Re-attach the lower unit to the outboard motor.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTest Operation:\u003c\/strong\u003e Connect a water supply (\"earmuffs\" or by submerging the unit) and run the engine at idle to confirm a steady stream of water from the tell-tale outlet.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this kit fits my specific Yamaha engine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: First, check your engine's model and year against the \"Compatible Engine Models\" table above. This kit replaces several OEM part numbers, including \u003cstrong\u003e663-44311-02\u003c\/strong\u003e and \u003cstrong\u003e6H4-W0078-A0-00\u003c\/strong\u003e. For further verification, we recommend using the \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e and reviewing the diagrams in the \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Parts Catalog\u003c\/a\u003e to match the parts exactly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What are the common signs of a failing water pump impeller?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The most common indicators include the engine overheating, a weak or non-existent water stream from the \"tell-tale\" cooling outlet, or discovering the old impeller is dry, brittle, cracked, or has missing vanes during an inspection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the water pump impeller?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: As a general rule, it is recommended to inspect the impeller annually and replace it every 1-2 years or after 100-200 hours of operation. Frequent use in saltwater or sandy\/silty water may require more frequent replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: OEM vs. Aftermarket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n    \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":50475698716985,"sku":"23KY087","price":54.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Water_Pump_Impeller_Kit_for_Yamaha_25_to_70_HP_663-44311-02_-_JLM_MARINE-8288881.jpg?v=1754991546"},{"product_id":"water-pump-impeller-kit-for-yamaha-25-to-70-hp-663-44311-2","title":"Water Pump Housing – Fits Yamaha 55HP C55 Outboards (Replaces 663-44311-02-00)","description":"\n\u003ch2\u003eWater Pump Housing – Fits Yamaha 55HP C55 Outboards (Replaces 663-44311-02-00)\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket water pump housing is designed for Yamaha 2-Stroke 55HP (C55) outboard models manufactured between 1991 and 1994. It serves as a direct replacement, ensuring proper fit and function for cooling system repairs.\u003c\/p\u003e\n\u003cp\u003eIt directly replaces Yamaha OEM part number \u003cstrong\u003e663-44311-02-00\u003c\/strong\u003e and is interchangeable with aftermarket part numbers from Sierra (9-43255) and GLM (12446).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Direct OEM replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Built to meet or exceed original equipment specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent:\u003c\/strong\u003e This is a single housing component. The complete water pump repair kit is sold separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e663-44311-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e9-43255\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e12446\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eC55\u003c\/td\u003e\n\u003ctd\u003e55\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1991-1994\u003c\/td\u003e\n\u003ctd\u003e663-44311-02-00\u003c\/td\u003e\n\u003ctd\u003eUsed with water pump kit 663-W0078-00\/01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eE48\u003c\/td\u003e\n\u003ctd\u003e48\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e663-44311-02-00\u003c\/td\u003e\n\u003ctd\u003eMentioned in Amazon listing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eOutboard Water Pump Housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eDirect OEM replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cp\u003eThis is a single component part. \u003cspan style=\"color:red;\"\u003eThe water pump housing is sold separately and does not include a complete repair kit.\u003c\/span\u003e\u003c\/p\u003e\n\n\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisconnect Power:\u003c\/strong\u003e Start by disconnecting the battery terminals to prevent electrical accidents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess the Lower Unit:\u003c\/strong\u003e Drain the gearcase oil from the lower unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove Lower Unit:\u003c\/strong\u003e Unbolt and carefully detach the lower unit from the outboard's midsection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove Old Housing:\u003c\/strong\u003e Locate the water pump assembly and unbolt the old housing to remove it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect Components:\u003c\/strong\u003e Check the impeller, wear plate, and gaskets (not included) for wear or damage. Replace them if necessary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean Surfaces:\u003c\/strong\u003e Thoroughly clean the mounting surfaces where the new housing will sit to ensure a perfect seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall New Housing:\u003c\/strong\u003e Position the new water pump housing and secure it by tightening the bolts to the manufacturer's recommended torque specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReassemble:\u003c\/strong\u003e Reinstall the lower unit onto the outboard motor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefill and Test:\u003c\/strong\u003e Refill the gearcase with the correct type and amount of lube. Reconnect the battery and run the engine on a water supply to check for proper cooling system operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this housing fits my Yamaha engine?\u003c\/strong\u003e\u003cbr\u003eThis housing is confirmed to fit Yamaha C55 models from 1991-1994 and is listed for E48 models. The most reliable method is to verify that your existing part number is \u003cstrong\u003e663-44311-02-00\u003c\/strong\u003e. Use our compatibility table and cross-reference guides to be certain.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a complete water pump kit?\u003c\/strong\u003e\u003cbr\u003eNo, this listing is for the \u003cstrong\u003ewater pump housing only\u003c\/strong\u003e. It is a single component and does not include the impeller, gaskets, or other parts found in a complete repair kit (sold separately).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are common signs of a failed water pump housing?\u003c\/strong\u003e\u003cbr\u003eKey indicators include the engine overheating, a noticeably weak or non-existent water stream from the \"tell-tale\" outlet, or discovering visible cracks, warping, or corrosion on the housing during an inspection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM vs. Aftermarket?\u003c\/strong\u003e\u003cbr\u003eThis listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003eWe offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003eThis product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":50485469380921,"sku":"SIE-17KY010","price":46.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Water_Pump_Impeller_Kit_for_Yamaha_25_to_70_HP_663-44311-02_-_JLM_MARINE-8289193.jpg?v=1755252184"}],"url":"https:\/\/jlmmarine.com\/collections\/yamaha-40mjht-pum-1995.oembed","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}