Maximize your time on the water with MERCURY factory part 33145. factory engineering designed for your exact engine — exactly what your engine was designed around. Genuine OEM isn’t just a label — it’s peace of mind on the water. Aftermarket parts often fail when you need them most. MERCURY factory components are manufactured to exacting standards that ensure reliable performance. Marine-grade materials, precision tolerances, rigorous quality control. That’s how you avoid premature failure and enjoy worry-free boating. Choose reliability. Choose MERCURY OEM part 33145. Reliability you can trust. Less time wrenching, more time on the water doing what you love. Forty years of serving boaters proves one thing: genuine factory parts are always the right choice. FITS: Water Pump Base O-Ring 25-33145 Fits Mercury Outboard Marine 8-200 HP Engine Also found in: 27-42364A92 (ENGINE/POWERHEAD GASKET SET), 26-41365A3 (GEAR HOUSING 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