{"product_id":"18643a5-mercruiser-coupling-genuine-used-part","title":"18643A5 Mercruiser Coupling | Genuine Used Part","description":"\u003cp\u003e\n 🔧 Product Description\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Genuine MerCruiser 14-Inch Flywheel Engine Coupler - Part Number: 18643A5\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n A genuine used MerCruiser triangular engine coupler for selected GM four-cylinder, V6 and V8 petrol engines connected to Alpha and specified Bravo sterndrives.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n The coupler bolts to a 14-inch flywheel and transfers engine torque through its internally splined hub to the sterndrive input shaft. The rubber-isolated hub also absorbs driveline shock and minor torsional vibration.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n ⚙️ Key Features\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine MerCruiser engine coupler\n\u003c\/p\u003e\n\u003cp\u003e\n • Correct Mercury reference 18643A5\n\u003c\/p\u003e\n\u003cp\u003e\n • Triangular 14-inch flywheel-mount design\n\u003c\/p\u003e\n\u003cp\u003e\n • Internally splined sterndrive-input hub\n\u003c\/p\u003e\n\u003cp\u003e\n • Extensive Sierra, GLM, Mallory, EMP and Repower cross-reference coverage\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM Supersession Chain:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 18643A5 MerCruiser late-style coupling assembly\n\u003c\/p\u003e\n\u003cp\u003e\n • 18643A7 related MerCruiser service kit containing the coupling and matching drive yoke components\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM \/ Related Numbers:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 18643A5\n\u003c\/p\u003e\n\u003cp\u003e\n • 18643A 5\n\u003c\/p\u003e\n\u003cp\u003e\n • 18643A7\n\u003c\/p\u003e\n\u003cp\u003e\n • Sierra related coupler and yoke kit: 18-2175\n\u003c\/p\u003e\n\u003cp\u003e\n • Marine Power: 0007-990F7\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Aftermarket \/ Verified Equivalents:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Sierra: 18-2323\n\u003c\/p\u003e\n\u003cp\u003e\n • GLM: 11532\n\u003c\/p\u003e\n\u003cp\u003e\n • Mallory: 9-72507\n\u003c\/p\u003e\n\u003cp\u003e\n • EMP: 93-93203\n\u003c\/p\u003e\n\u003cp\u003e\n • Repower Marine: RM93-93203\n\u003c\/p\u003e\n\u003cp\u003e\n • Marine Power: 0007-990F7\n\u003c\/p\u003e\n\u003cp\u003e\n • JML: JM-11532\n\u003c\/p\u003e\n\u003cp\u003e\n • FridayParts: FPZY2409146\n\u003c\/p\u003e\n\u003cp\u003e\n • KuduParts: ZH-9393203\n\u003c\/p\u003e\n\u003cp\u003e\n • Aftermarket reference: 9393203\n\u003c\/p\u003e\n\u003cp\u003e\n • Aftermarket reference: 701121\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🚤 Compatibility\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Commonly used on:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser Alpha One and Alpha One Gen II sterndrives\n\u003c\/p\u003e\n\u003cp\u003e\n • Selected late MR and Bravo LX installations\n\u003c\/p\u003e\n\u003cp\u003e\n • GM marine engines using a 14-inch flywheel and small crankshaft bolt pattern\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Typically suits:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine models:\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 3.0L four-cylinder - approximately 1999 onward with 14-inch flywheel\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 4.3L V6 - approximately 1986 onward with applicable Alpha drive\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 4.3LX V6\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 5.0L GM V8\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 5.0LX V8\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 5.7L GM V8\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 5.7LX V8\n\u003c\/p\u003e\n\u003cp\u003e\n • MerCruiser 350 MAG applications using coupler 18643A5\n\u003c\/p\u003e\n\u003cp\u003e\n • Alpha One and Alpha One Gen II installations\n\u003c\/p\u003e\n\u003cp\u003e\n • Selected Bravo LX transom applications specifying 18643A5\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • HP Range: Engine-output dependent\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine Type: GM inline four-cylinder, V6 and small-block V8 petrol marine engine\n\u003c\/p\u003e\n\u003cp\u003e\n • Year Range: Approximately 1987 - 2009, with 3.0L fitment generally from 1999 onward\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔌 Function\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n The coupler transfers crankshaft and flywheel rotation to the sterndrive input shaft. Its rubber-bonded centre reduces shock loads and permits minor alignment movement between the engine and drive.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Common signs of failure:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine runs but the sterndrive does not turn\n\u003c\/p\u003e\n\u003cp\u003e\n • Burning-rubber smell from the flywheel housing\n\u003c\/p\u003e\n\u003cp\u003e\n • Metallic or rubber debris near the coupler\n\u003c\/p\u003e\n\u003cp\u003e\n • Splines stripped or heavily worn\n\u003c\/p\u003e\n\u003cp\u003e\n • Coupler hub rotates inside the rubber section\n\u003c\/p\u003e\n\u003cp\u003e\n • Repeated coupler failure caused by engine misalignment\n\u003c\/p\u003e\n\u003cp\u003e\n • Vibration or knocking from the rear of the engine\n\u003c\/p\u003e\n\u003cp\u003e\n • Drive shaft is difficult to insert during assembly\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 📦 Condition\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine used part\n\u003c\/p\u003e\n\u003cp\u003e\n • Removed from running engine where applicable\n\u003c\/p\u003e\n\u003cp\u003e\n • In good working condition unless otherwise stated\n\u003c\/p\u003e\n","brand":"Sawley's Auto and Marine","offers":[{"title":"Default Title","offer_id":55742873174308,"sku":"6081719","price":300.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_e2cba4ea-b379-46f6-be83-b3d56e62bfe2.jpg?v=1784202932","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/18643a5-mercruiser-coupling-genuine-used-part","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}