Mercury – Water Pump Housing | Sea Water Pump Component | Brass Construction | 8M0139984

Overview

Out on the water, you get a feel for the parts you can trust. When your cooling system is doing its job, the engine settles into that steady rhythm you can feel through the deck—strong, smooth, and unbothered by long runs or tight maneuvering. The Mercury 8M0139984 Brass Water Pump Housing delivers that kind of confidence. Built for the V6 and V8 MerCruiser sterndrive engines many boaters depend on, this housing stands up to harsh saltwater conditions without flinching. It’s one of those pieces you install once and immediately appreciate, knowing your cooling system is protected by something solid, durable, and designed with real-world boating in mind.

Key Features

• Replacement water pump housing for select V6 and V8 MerCruiser sterndrives
• Crafted from marine-grade brass for exceptional corrosion resistance
• Designed specifically for engines using the brass sea water pump
• Meets Mercury Marine original equipment standards for performance and longevity
• Precision-machined housing ensures proper fit and cooling efficiency
• Ideal for saltwater and high-demand environments
• Built to support dependable pump operation season after season

Engine & Boat Compatibility

• Compatible with select MerCruiser V6 and V8 engines from model years 2000–2016
• Fits engines including 305, 350, and 496 cubic inch displacement configurations
• Intended for sterndrive-equipped boats requiring a brass sea water pump housing
• Common on cruisers, sport boats, offshore fishing boats, and heavy-use recreational vessels
• Suitable for both freshwater and saltwater operations

Performance & Practical Benefits

A water pump housing isn’t something most people think about—until it fails. With the 8M0139984 Brass Water Pump Housing, you get a component that’s built to endure the toughest parts of marine use. Saltwater, high load, long idle periods, sandy inlets—this housing is engineered to handle it all. The brass construction doesn’t just resist corrosion; it shrugs it off, keeping the pump steady and the cooling water moving at the rate your engine expects.

In real use, that translates to cooler running temperatures, fewer surprises at the helm, and the peace of mind that your engine isn’t fighting against hidden wear or internal pitting. The fit is tight, the installation straightforward, and once it’s bolted down, it becomes one of those parts you stop worrying about entirely. Everything feels more secure and predictable—exactly the way a MerCruiser should run.

Why Buy OEM

When you’re dealing with a cooling system, shortcuts just aren’t worth it. An OEM Mercury Marine part like the 8M0139984 is engineered to match your pump design, flow requirements, and mounting points perfectly. Aftermarket housings may look similar, but they rarely match the precision or corrosion resistance of genuine brass Mercury parts. Choosing OEM means fewer failures, fewer haul-outs, and far fewer headaches. If you want the best long-term value, sticking with Mercury is the most dependable move.

FAQ

Q1: Which engines does the 8M0139984 Water Pump Housing fit?

It fits select V6 and V8 MerCruiser engines, specifically 305, 350, and 496 cubic inch models from 2000–2016.

Q2: What sets this housing apart from aftermarket versions?

Its Brass construction and true OEM engineering deliver superior durability and a precise fit designed for MerCruiser cooling systems.

Q3: How do I know if this is the right replacement for my boat?

Check your owner's or service manual, or confirm that your engine uses the brass sea water pump design.

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

Yes—its Brass body excels in saltwater environments and works perfectly in freshwater as well.

Q5: Is installation manageable for most boat owners?

Most mechanically inclined boaters can handle it with basic tools, but professional installation is always an option.