If your outboard's water pump impeller needs replacing, this Sierra repair kit has you covered. The Sierra 18-3215 includes a new impeller and related components designed to fit many Mercury and Mariner outboard motors. It's a direct replacement for OEM part numbers like Mercury 47-85089T7 and 47-85089Q4. Sierra parts are known for matching or exceeding original equipment quality. Helps restore proper cooling water flow to prevent overheating. Essential maintenance for boat owners – a worn impeller can lead to big engine problems. Whether you're doing annual service or fixing an issue, this kit makes the job easier. Always double-check compatibility with your specific motor model and year. Keep your outboard running cool and reliable on the water. A smart, affordable way to maintain your marine engine's performance and longevity. Don't let a simple impeller ruin your boating day!