Sierra 18-3201 Water Pump Kit - OMC

Keep your OMC outboard running cool and reliable with the Sierra 18-3201 Water Pump Kit. Designed as a direct replacement for original equipment, this kit ensures optimal coolant flow to prevent overheating during those long days on the water. Whether you're tackling rough waves or cruising calm bays, a dependable water pump is essential for engine longevity and performance.

Precision Engineering for Peak Performance

Crafted from high-quality, corrosion-resistant materials, the Sierra 18-3201 stands up to the harsh marine environment. The kit includes a durable impeller, housing, wear plate, and all necessary gaskets and seals for a complete rebuild. Unlike flimsy generics, Sierra's components are engineered to match OEM specifications, delivering consistent water pressure and flow rates that keep your engine at ideal temperatures.

• Impeller molded from premium neoprene for flexibility and longevity
• Stainless steel fasteners resist rust and seizing
• Pre-assembled components for straightforward installation
• Meets or exceeds ABYC and NMMA standards for marine safety

Perfect Fit for OMC Outboards

This water pump kit is tailored for a wide range of Johnson and Evinrude outboards from the OMC lineup. It slots right into popular V4 and V6 models, restoring factory-level cooling efficiency without modifications. Boaters rave about how it revives older engines, eliminating vapor lock and hot spots that plague worn-out pumps.

Why It Outshines the Competition

Sierra doesn't cut corners—each 18-3201 kit undergoes rigorous testing for balance, seal integrity, and flow dynamics. You'll notice smoother operation, quieter performance, and better fuel efficiency as your engine stays cooler under load. It's a smart upgrade for preventative maintenance, catching issues before they sideline your boat.

Effortless Installation Tips

Swapping out your water pump doesn't have to be a headache. Start by draining the system and removing the lower unit. Clean mating surfaces thoroughly to avoid leaks. Lubricate the impeller with marine grease during install for easy spin-up. Torque to spec, and prime the system before firing up. Most DIYers wrap it up in under an hour—tools needed: basic socket set, gasket scraper, and sealant.

1. Disconnect lower unit and inspect old pump
2. Remove retainer and extract impeller
3. Install new wear plate and key
4. Seat impeller by hand, avoiding petroleum lubes
5. Reassemble, test for leaks on the hose

Pro tip: Flush with fresh water after saltwater runs to extend kit life.

Long-Term Maintenance for Worry-Free Boating

Inspect your water pump annually or every 100 hours. Look for impeller cracks, glazing, or housing wear. Pair with a thermostat check and zinc anode replacement for full cooling system health. This proactive approach minimizes breakdowns and maximizes your time on the water.