Mercury MerCruiser Block Off Kit

The Mercury MerCruiser 8M0095447 Block Off Kit is a genuine OEM Mercury Marine component designed for selected MerCruiser 4.5L Alpha sterndrive engines. This kit is commonly used in conjunction with Mercury closed cooling systems and engine-mounted raw water pump conversions to properly seal and block unused water inlet passages.

Manufactured to Mercury Marine specifications, the kit provides a direct-fit solution for cooling system modifications and repairs while maintaining proper engine cooling performance and reliability. It is designed for use on 1998 and newer Alpha One Gen II, Bravo I, Bravo II and Bravo III applications where specified by Mercury service procedures.

The 8M0095447 kit supersedes several earlier Mercury part numbers and is commonly installed when fitting Mercury closed cooling kits or engine-mounted seawater pump systems. Genuine Mercury components ensure proper fitment, corrosion resistance and long-term durability in marine environments.