Stay out of the repair shop. Genuine MERCURY part 856704 ensures factory engineering designed for your exact engine — exactly what your engine was designed around. Stay out of the repair shop with factory-quality MERCURY parts. Aftermarket parts often fail when you need them most. While aftermarket alternatives cut corners on materials and tolerances, genuine OEM components meet strict manufacturing standards your engine requires. Marine-grade construction ensures reliable performance in demanding saltwater environments. Get it right with MERCURY OEM part 856704. Reliability you can trust. Factory precision equals fewer headaches and more confidence on the water. Four decades of marine expertise backs that up — genuine parts simply perform better. FITS: This gasket is for use on various Mercury Mariner outboard engines. This is an OEM factory part. Please check the part numbers for your fitment needs. If you Also found in: 27-85653A87 (GASKET SET), 46-73804A3 (PUMP KIT), 26-55682A1 (SEAL KIT) — STAY OUT ON THE WATER LONGER WITH GENUINE OEM PARTS FROM US BOATWORKS. Over 2 million parts in stock including NLA and hard-to-find parts. Can’t find what you’re looking for? Call or text us: 913-342-0011