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Mercruiser Engine Coupler by Sierra
Used when replacing V6 or V8 2 piece rear main seal with 3-1/2" crankshaft bolt pattern to a newer 1 piece rear main seal engine with 3" bolt pattern.
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Mercruiser Engine Coupler Kit by Sierra Flex plate style for late model, small crankshaft bolt pattern, style engines. Uses: Yoke Shaft 18-2146 Replaces: Mercruiser 18643A7,12632A4,18643A2 Aqua...Add to Cart