Mercury – Water Pump Repair Kit | Cooling System Series | OEM Components | 8M0113801

Overview

Anyone who spends real time on the water knows how much you depend on a steady, cool-running engine. When the water pump is healthy, everything feels smoother — the shifts, the throttle, even the sound of the motor settling in at idle. It brings a kind of quiet confidence that lets you enjoy the day instead of worrying about temperature spikes. The Mercury 8M0113801 Water Pump Repair Kit was built for that peace of mind, giving your 30–60 horsepower four-stroke outboard the strong, reliable cooling system it was meant to have.

Key Features

• Complete kit to restore proper water pump performance
• Includes impeller, pump housing, face plate, gaskets, and o-rings
• Designed for select Mercury and Mariner 30–60 horsepower four-stroke outboards
• OEM components engineered for long-lasting durability and cooling efficiency
• One of the most complete repair kits available for these engines

Engine & Boat Compatibility

• Fits Mercury 30–60 horsepower four-stroke outboards
• Fits Mariner 30–60 horsepower four-stroke outboards
• Common on pontoon boats, aluminum fishing rigs, center consoles, runabouts, and utility skiffs
• Ideal for boats regularly used in shallow water, warm climates, and heavily loaded conditions

Performance & Practical Benefits

A properly functioning water pump is the lifeline of your outboard, and you’ll feel the benefits immediately after installing this kit. The impeller delivers a strong and steady flow of cooling water, keeping engine temperatures stable even during long idle periods or hard acceleration. The housings and seals go in with a tight, secure fit that restores pressure and eliminates cooling inefficiencies that develop over time.

On the water, this translates into a smoother, more predictable engine response. You’ll hear a cleaner idle, feel a steadier temperature range, and enjoy the quiet assurance that your engine is staying protected. The components resist wear from grit, heat, and salt, which gives you more trouble-free seasons before the next service. It’s the kind of maintenance that pays off immediately and continues to protect your investment.

Installation is straightforward for most boat owners, especially those who’ve handled a water pump service before. Each piece fits cleanly without modification, and the kit includes everything needed so you’re not chasing extra parts mid-repair.

Why Buy OEM

Cooling system parts need exact fitment to deliver reliable performance, and that’s where genuine Mercury Marine components shine. Aftermarket parts often cut corners on materials or molding tolerances, leading to leaks, premature wear, or inconsistent flow.

Mercury Marine part number 8M0113801 is designed specifically for the water passages, pressure requirements, and engineering standards of your four-stroke outboard. With OEM, you get the right parts the first time — a practical choice that protects your engine, prevents overheating, and extends its lifespan.

FAQ

Q1: Which engines does the Mercury 8M0113801 Water Pump Repair Kit fit?

It fits select Mercury and Mariner 30–60 horsepower four-stroke outboards.

Q2: What makes this kit different from aftermarket versions?

OEM components deliver more precise fitment, superior durability, and reliable long-term cooling performance.

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

Check your engine model and serial range against Mercury Marine part number 8M0113801 or refer to your owner’s manual.

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

Yes — the materials are engineered to withstand both environments.

Q5: Is installation straightforward?

Most boaters with basic tools and experience can complete the job without difficulty.