{"product_id":"engine-coupler-for-mercruiser-mercury-sierra-3-0l-4-cyl-12632a6-18-2321","title":"Engine Coupler for MerCruiser Mercury Sierra 3.0L 4 Cyl 12632A6 18-2321","description":"\u003cstrong\u003eThis Engine Coupler is a marine coupling component compatible with MerCruiser, Mercury, and Sierra 3.0L 4-cylinder engines and matches OEM Part# 12632A6, 18-2321, 9-72506.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis engine coupler transfers torque from the engine to the drive shaft in MerCruiser, Mercury, and Sierra 3.0L 4-cylinder marine applications. Designed for direct replacement, it ensures smooth power delivery and reliable connection between the engine and outdrive. Ideal for boat owners and marine mechanics seeking a durable OEM-spec coupler for their 3.0L 4-cylinder stern drive.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePrecision-engineered splines for secure fitment with MerCruiser and Mercury drive shafts\u003c\/li\u003e\n\u003cli\u003eConstructed from high-strength steel to withstand marine torque loads\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM part numbers 12632A6, 18-2321, and 9-72506\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant finish protects against saltwater and freshwater environments\u003c\/li\u003e\n\u003cli\u003eMatches factory specifications for reliable long-term operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompatible with MerCruiser 3.0L 4-cylinder engines (1985–2000 models)\u003c\/li\u003e\n\u003cli\u003eCompatible with Mercury Marine 3.0L 4-cylinder engines\u003c\/li\u003e\n\u003cli\u003eCompatible with Sierra aftermarket drive systems using OEM equivalent parts\u003c\/li\u003e\n\u003cli\u003eReplaces OEM part numbers: 12632A6, 18-2321, 9-72506\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacement of worn or damaged engine couplers in MerCruiser Alpha One and Alpha One Gen II drives\u003c\/li\u003e\n\u003cli\u003eMarine engine-to-outdrive torque transfer in stern drive boats\u003c\/li\u003e\n\u003cli\u003eService and repair of 3.0L 4-cylinder gasoline marine engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 12632A6, 18-2321, 9-72506\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-strength steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 3.0L 4-cylinder MerCruiser \/ Mercury \/ Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type:\u003c\/strong\u003e Stern drive\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this engine coupler a direct replacement for my MerCruiser 3.0L?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, it directly replaces OEM part numbers 12632A6, 18-2321, and 9-72506 for MerCruiser 3.0L 4-cylinder engines from 1985–2000.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the spline count on this coupler?\u003cstrong\u003e A:\u003c\/strong\u003e This coupler has the standard 17-spline configuration used on Alpha One and Alpha One Gen II drives.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53676803719441,"sku":"ZZ2Y02413","price":527.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/57_642aa570-cf48-48a8-9ea9-33c7e7545610.jpg?v=1781578484","url":"https:\/\/www.duraforce.com\/products\/engine-coupler-for-mercruiser-mercury-sierra-3-0l-4-cyl-12632a6-18-2321","provider":"DURAFORCE","version":"1.0","type":"link"}