Mercury/Mariner 6–15 HP Water Pump Impeller – Durable 6-Blade Design

The Mercury/Mariner 6–15 HP water pump impeller is a critical component for maintaining reliable cooling in your small outboard engine. Designed specifically for engines in this horsepower range, it ensures your motor runs at optimal temperature whether you’re cruising on calm waters or tackling choppy seas. The durable neoprene construction with 6 blades delivers a continuous strong flow of cooling water through the engine, safeguarding vital components from overheating and extending your motor’s lifespan.

Replacing this impeller is straightforward and quick – it fits perfectly in place of the old one with no modifications needed. Even boat owners with basic mechanical skills can perform the swap using common tools. Regular upkeep of the cooling system, including timely impeller replacement, is recommended by professionals to prevent costly damage from overheating. This practice keeps your engine running efficiently and reliably over time.

This impeller is ideal for owners of small boats and fishing vessels equipped with Mercury/Mariner outboards between 6 and 15 HP. It’s commonly used on inflatable dinghies, small fishing skiffs (jon boats), or compact RIBs up to around 3–4.5 meters in length. Having this spare part on board is wise – experienced boaters often carry a backup impeller for extended trips. Whether you operate in fresh lakes or salty marine environments, the neoprene material resists abrasion from sand and silt, maintaining its flexibility and cooling efficiency.

By investing in a quality impeller like this, you ensure the reliable performance of your Mercury/Mariner engine. Timely replacements (recommended every 100 engine hours or once per year) guarantee optimal cooling and peace of mind on the water. This model meets OEM specifications (equivalent to Mercury part #47-42038) and is a trusted choice among marine service centers and boat enthusiasts.

• Perfect for Small Vessels: Suitable for inflatable dinghies, small fishing boats, and other vessels (~3–4.5 m) powered by Mercury/Mariner 6–15 HP outboards.
• Routine Maintenance: Replace the impeller yearly or about every 100 running hours to ensure reliable cooling and avoid engine damage.
• Spare Onboard: It’s recommended to keep a spare impeller with your emergency gear, especially for long journeys or remote cruising grounds.
• OEM Equivalent: Manufactured to original standards, providing the same performance and fit as the factory part.
• Built for Harsh Conditions: Neoprene construction resists saltwater and fine debris, making it suitable for all water conditions and extending service life.