Mercury – Water Pump Repair Kit | Cooling System Restoration Kit | Marine-Grade Components | 8M0100527

Overview

If you spend enough time on the water, you start to recognize the small signs of an engine that’s running just right—the soft hum at idle, the steady temperature, that calm confidence that you’re not about to get stranded when you’re miles from the dock. The Mercury 8M0100527 Water Pump Repair Kit is made for boaters who know how important those details really are. When silt, sand, or debris begin to wear down your pump, your engine feels it long before you notice it. This kit brings back strong, reliable cooling flow, giving you the peace of mind that only genuine Mercury parts can deliver.

Key Features

• Complete 15-piece water pump repair kit
• Designed to restore cooling efficiency and protect your engine
• Includes impeller, gaskets, seals, o-rings, plates, and hardware
• Engineered for high durability and consistent water flow
• Built to Mercury Marine OEM specifications for optimal fit and performance

Engine & Boat Compatibility

The Mercury Marine part number 8M0100527 is engineered to fit a wide range of outboards and sterndrives, including:

FourStroke Outboards:

• 40–60 horsepower BigFoot/Command Thrust
• 75–115 horsepower FourStroke
• 150 horsepower EFI FourStroke
• L4 and L6 Verado outboards with 4.80-inch diameter torpedo gearcases

TwoStroke Outboards:

• 60 horsepower BigFoot (serial number 0D000750 and above)
• 70–90 horsepower (serial number 0A996142 and above)
• 100–125 horsepower four-cylinder models with pump cover screws without insulators
• 3.0-liter V-200, V-225, V-250

MerCruiser Sterndrives:

• Alpha One Gen II (serial number 0D469859 and above)

Ideal for:

• Fishing boats
• Pontoons
• Workboats
• Runabouts
• Offshore setups needing dependable cooling at varying speeds

Performance & Practical Benefits

Cooling flow can make or break your engine’s longevity. Install this kit and you’ll immediately feel the difference in how your engine settles in—smooth, steady, balanced. The impeller’s flexible elastomers handle cold starts and hot summer runs without stiffening or breaking down. Gaskets and o-rings seat cleanly, giving you a tight, secure seal throughout the pump housing.

You also get higher, more consistent water flow, which means better protection during long days trolling, idling through shallow channels, or running at wide-open throttle. Everything in the kit fits together exactly as it should, without forcing or fiddling. It’s the kind of straightforward maintenance that pays off every trip you take.

Why Buy OEM

Choosing an OEM Mercury Marine part isn’t about being fancy—it’s about being smart.

• Designed to fit perfectly without guesswork
• Built from marine-grade materials meant for real-world conditions
• More reliable and longer lasting than aftermarket alternatives
• Helps protect your cooling system, gearcase, and engine
• Backed by decades of Mercury engineering and testing

If you want the repair done right the first time, OEM is the only way to go.

FAQ

Q1: Which engines does the 8M0100527 kit fit?

It fits numerous Mercury TwoStroke and FourStroke outboards, L4/L6 Verado models, and MerCruiser Alpha One Gen II sterndrives.

Q2: What makes this better than aftermarket kits?

Exact-fit components, higher-quality materials, and trusted Mercury engineering ensure better cooling and longer service life.

Q3: How do I know this is the correct kit?

Match your model and serial number to the compatibility list or check your owner’s manual.

Q4: Can it be used in both saltwater and freshwater?

Yes—this kit is built for both environments and resists corrosion and abrasion.

Q5: Is installation easy for most boaters?

Most mechanically inclined boaters can complete the repair with common tools, though professional installation is always an option.