Mercury – Water Pump Pulley | MerCruiser Sterndrive & Inboard Series | Steel, EDP Finish | 8M0150724

Overview

Anyone who’s spent enough hours behind the helm knows how much trust we place in the little things—the parts we rarely see but depend on every moment we’re underway. A water pump pulley might not be the star of the show, but when it’s doing its job, everything feels right: the engine stays cool, the power stays steady, and you can focus on the water instead of worrying about what’s happening under the hatch. The Mercury/Quicksilver Water Pump Pulley 8M0150724 brings that quiet confidence back to your setup, giving your MerCruiser engine the kind of reliability you can feel in the throttle and hear in the smooth hum of a well-tuned ride.

Key Features

• Designed for select MerCruiser sterndrive and inboard engines with a brass seawater pump
• Constructed from long-lasting steel for dependable strength
• Electro-deposit primer (EDP) coating enhances corrosion resistance
• Six-groove design for stable belt engagement
• 5.7-inch outside diameter
• .59-inch shaft bearing inside diameter
• Built to maintain proper cooling system performance

Engine & Boat Compatibility

• Fits MerCruiser 4.3L
• Fits MerCruiser 5.0L
• Fits MerCruiser 5.7L
• Fits MerCruiser 6.2L
• Fits MerCruiser 8.1L
• Compatible with General Motors–based sterndrive and inboard platforms featuring a brass seawater pump
• Commonly found on bowriders, cruisers, center consoles, performance boats, and workboats

Performance & Practical Benefits

A good pulley keeps everything in sync. With this Mercury Marine part, you’ll feel a smooth, steady transfer of power through the serpentine belt, helping your cooling system deliver consistent water flow even during long, hot runs or slow, heavy trolling sessions. The steel construction adds an unmistakable sense of durability—solid, weighty, built for seasons of real use.

The EDP coating helps the pulley stand up to the salt, humidity, and constant mist that define marine life. It doesn’t just slow down corrosion; it helps preserve the clean, even belt contact your engine depends on. Install it, and you’ll notice how tight and sure the belt sits, free of wobble or chatter.

And because it’s built precisely to Mercury specifications, the fitment is exact. No alignment issues, no guessing. Just a pulley that slots into place and does its job without fanfare—which is exactly what you want from a component that helps protect the heart of your cooling system.

Why Buy OEM

• Engineered specifically for MerCruiser applications
• Built to exact factory dimensions for a precise fit
• Longer service life thanks to premium materials and corrosion-resistant finish
• Helps maintain proper cooling efficiency and belt performance
• More reliable than many generic alternatives that may not meet marine-grade requirements

When you’re dealing with cooling system components, cutting corners is never worth it. OEM gives you reliability you can put your name on.

FAQ

Q1: Which engines does this pulley fit?

It fits MerCruiser 4.3L, 5.0L, 5.7L, 6.2L, and 8.1L sterndrive and inboard engines equipped with a brass seawater pump.

Q2: What makes this pulley better than aftermarket options?

The steel construction, exact Mercury sizing, and EDP coating give it better longevity and a more accurate fit.

Q3: How can I confirm it’s the right pulley for my engine?

Check your engine model and ensure it uses a brass seawater pump. Your service manual will list the compatible part number.

Q4: Is it suitable for both saltwater and freshwater?

Yes — the EDP coating is designed to handle harsh saltwater environments as well as freshwater conditions.

Q5: Is installation straightforward?

Most boat owners comfortable with belt and pump service will find it simple. Just inspect the serpentine belt and bushing while replacing the pulley.