Keep your engine running like new with MERCURY part 858524. factory engineering designed for your exact engine — exactly what your engine was designed around. Don’t risk premature failure with inferior parts. Aftermarket parts often fail when you need them most. Genuine MERCURY OEM components use marine-grade materials and precise engineering that aftermarket brands can’t replicate. Factory quality means reliable performance when you’re miles from shore and reliability matters most. Count on MERCURY part 858524 for dependable performance. Reliability you can trust. Factory precision means staying out on the water longer, not stuck at the dock with failures. Four decades of marine experience proves genuine OEM is the smart investment. FITS: Part number 27-858524. Quicksilver Upper Gasket | Water Pump For use on various Mercury and Mariner outboard engines. Over 100 Mercury/Mariner outboards use 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