Mercury – Water Pump Impeller Repair Kit | MerCruiser V6 & V8 Brass Seawater Pump Series | Marine Composite & Brass Components | 8M0137219

Overview

There’s a certain confidence you feel when your cooling system is running exactly the way it should. The engine settles into that familiar rhythm, the boat glides steadier, and you stop thinking about what’s happening under the hatch and simply enjoy the water. That’s the kind of peace of mind a dependable impeller brings, and why so many boaters stick with genuine Mercury parts. The Mercury Marine part 8M0137219 Water Pump Impeller Repair Kit is built for those long days when you need your gear to work without hesitation — whether you’re cruising a quiet channel or pushing across open water with a full crew.

Key Features

• Complete water pump impeller repair kit for MerCruiser V6 and V8 brass seawater pump systems
• Heavy-duty shorter impeller designed for worn housings
• Over-molded inner (front) wear plate for improved sealing and efficiency
• Ideal for restoring cooling flow when debris has damaged the pump’s internal surfaces
• Manufactured to Mercury Marine OEM specifications for proper fit and reliable durability

Engine & Boat Compatibility

• MerCruiser V6 and V8 engines: 305, 350, 496, and 502 cubic-inch displacement
• Model years 2000 and newer
• Equipped with brass seawater pumps
• Not compatible with Mercury/MerCruiser 4.5L and 6.2L engines
• Common on cruisers, sport boats, runabouts, bowriders, and mid-size sterndrive vessels

Performance & Practical Benefits

Cooling issues are one of those problems you notice immediately — the temperature climbs, the engine feels stressed, and suddenly you’re not thinking about the water anymore. This repair kit helps bring everything back into balance. The redesigned shorter impeller grabs and moves water with a smooth, steady pull, even when the pump housing has seen a bit of wear from sand, grit, or time. The included wear plate gives the pump a tight, clean surface to seal against, helping restore pressure and giving your cooling system the chance to perform the way it did when the engine was new.

Installation is straightforward if you’re familiar with Mercury’s brass seawater pumps. Every piece fits cleanly, with the kind of snug, precise alignment that makes you feel like the kit was built just for your engine — because it was. Once installed, you’ll hear and feel the difference: cooler running temps, steadier operation, and far fewer concerns about overheating when you’re waiting at the dock, towing a skier, or running up on plane.

Why Buy OEM

When it comes to cooling, guessing isn’t worth the risk. Mercury’s OEM parts are engineered to match exact pump dimensions, materials, and flow rates. Aftermarket kits may look similar, but the elastomer quality, blade flexibility, and wear-plate tolerances often fall short. With this Mercury Marine part, you get predictable longevity, the correct water flow, and the reassurance that you’re protecting the heart of your sterndrive. It’s the practical choice for any boater who values long-term reliability over short-term savings.

FAQ

Q1: Which engines does this impeller repair kit fit?

It fits MerCruiser V6 and V8 engines (305, 350, 496, 502 CID) from 2000 and newer equipped with a brass seawater pump.

Q2: How is it different from aftermarket repair kits?

Mercury’s materials, blade geometry, and wear-plate engineering match factory specs exactly, ensuring correct water flow and long-term cooling performance.

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

Check your engine model and confirm that your sterndrive uses the brass seawater pump. It does not fit 4.5L or 6.2L MerCruiser engines.

Q4: Can this be used in saltwater?

Absolutely. The components are designed for both saltwater and freshwater use.

Q5: Is installation manageable for most owners?

If you’ve serviced a seawater pump before, this will be familiar. A service manual helps ensure proper alignment and torque.