Mercury – Impeller | Cooling System Component | Marine Elastomer | 8M0200115

Overview

Every boater knows that a smooth-running engine isn’t just about horsepower or throttle response. It’s about trust — trust that your cooling system is pulling water the instant your engine turns over, trust that the temperature stays steady even when the sun is beating down and the boat is loaded with gear. The Mercury Impeller, part number 8M0200115, is one of those unsung components that keeps everything running cool and predictable. You may not think about it every time you head out, but you feel its importance each time your engine holds temperature and your day goes exactly the way it should.

There’s real comfort in knowing this small part is built by the same engineers who designed the outboards it supports. It fits right, it performs right, and it keeps your engine protected when you’re miles from shore.

Key Features

• Provides essential cooling water flow for high-performance Mercury outboards
• Built with marine-grade elastomers for strong flexibility across temperature swings
• Engineered for precise fitment and reliable rotation inside the water pump housing
• Designed to maintain steady water pressure and optimal cooling performance
• Genuine Mercury Marine part for dependable, long-term operation

Engine & Boat Compatibility

• Fits Mercury 5.7 liter V10 Verado outboards from 350 to 425 horsepower
• Compatible with V10 SeaPro outboards in the same horsepower range
• Designed for Mercury Racing 4.6 liter V8 500R outboards
• Commonly used on large center consoles, offshore fishing boats, high-performance vessels, and commercial craft that demand consistent cooling

Performance & Practical Benefits

A good impeller keeps things steady — and steady is exactly what you want when the day heats up, the tide turns, or you’re pushing through chop. This impeller moves water smoothly and efficiently, keeping your engine cool at idle and under load. Its flexible blades are designed to maintain their shape through the full boating season, even when water temperatures swing from chilly mornings to hot midsummer afternoons.

You’ll notice the difference in how confidently the engine maintains its temperature. Everything feels tight, predictable, and secure. A strong, consistent flow of cooling water protects the internal components you rely on, helping the outboard deliver smooth power and long-term reliability. Installation is straightforward, thanks to the precise tolerances and clean fit that Mercury is known for.

It’s a simple component, but when it’s built right, it supports the entire performance of your outboard.

Why Buy OEM

With vital components like an impeller, aftermarket parts simply can’t match Mercury’s engineering. An incorrect fit or stiff blade material can cause overheating, uneven wear, or poor water pressure. This genuine Mercury Marine part is designed to work flawlessly with the V10 and Mercury Racing platforms, giving you peace of mind every time you turn the key.

Choosing OEM isn’t about spending more — it’s about protecting your engine, your time, and your investment. It lasts longer, installs cleaner, and ensures your cooling system performs exactly the way it was designed to.

FAQ

Q1: Which Mercury engines does this impeller fit?

It fits Mercury 5.7 liter V10 Verado and SeaPro outboards from 350 to 425 horsepower, as well as Mercury Racing 4.6 liter V8 500R outboards.

Q2: What makes this impeller different from aftermarket versions?

The elastomer blend, precise tolerances, and performance testing are all tailored specifically to Mercury cooling systems.

Q3: How do I know if this is the correct replacement?

Check your engine model and part number requirements. If your outboard matches the listed series and horsepower range, this is the correct Mercury Marine part.

Q4: Can it be used in saltwater and freshwater?

Yes. The materials are engineered to withstand both environments without hardening or premature wear.

Q5: Is installation straightforward for most boat owners?

Yes. Most owners with basic mechanical experience find the impeller easy to install once the lower unit is removed.