Mercury – Water Pump Repair Kit | Cooling System Component | Complete OEM Kit | 42038T3

Overview

A dependable cooling system is key to engine longevity, and the Mercury Marine 42038T3 Water Pump Repair Kit keeps that system performing like new. Built for Mercury and Mariner 6–15 horsepower TwoStroke and FourStroke outboards, this kit includes all the vital components needed to restore proper water flow — the impeller, drive key, gaskets, face plate, and water tube guide. Each part is designed to factory specs for a perfect fit, ensuring smooth installation and reliable performance every time you’re on the water.

Key Features

• Purpose: Rebuilds your water pump to restore steady cooling flow and prevent overheating.
• Contents: Includes impeller, gaskets, face plate, drive key, and water tube guide.
• Material: Made from marine-grade elastomers, stainless components, and corrosion-resistant metals.
• Performance: Maintains optimal water pressure and flow across all operating speeds.
• Ease of Use: Installs easily with common tools — a straightforward repair for any boater.
• Compatibility: Fits Mercury and Mariner 6–15HP TwoStroke and FourStroke outboards.

Engine & Boat Compatibility

• Mercury and Mariner 6–15HP outboards, both TwoStroke and FourStroke.
• Found on small fishing boats, inflatables, and aluminum runabouts.
• Suitable for both freshwater and saltwater operation.
• Works as a direct replacement for the factory water pump components.

Performance & Practical Benefits

The 42038T3 repair kit keeps your outboard’s cooling system efficient and reliable. The new impeller restores steady water flow, while the included gaskets and seals prevent leaks that can cause pressure loss or overheating. Every part in this kit is engineered to withstand constant exposure to heat, vibration, and water.

Replacing your water pump regularly is an easy way to protect your engine from damage, improve cooling efficiency, and maintain strong performance. Once installed, this OEM kit ensures your outboard runs cooler and lasts longer — just as Mercury intended.

Why Buy OEM

The Mercury 42038T3 is a genuine OEM replacement kit, designed specifically for Mercury and Mariner engines. Aftermarket kits may not match Mercury’s tight tolerances or material standards, leading to leaks or early wear.

OEM Mercury components are built from tested marine-grade materials, guaranteeing proper fit, flow, and durability. With this factory kit, you get confidence that your cooling system will perform just like it did when your outboard was new.

FAQ

Q1: Which engines does this repair kit fit?
It fits Mercury and Mariner 6–15HP TwoStroke and FourStroke outboards.

Q2: What’s included in the kit?
The kit comes with an impeller, drive key, gaskets, face plate, and water tube guide.

Q3: When should I rebuild my water pump?
Inspect it annually and rebuild it every two seasons or 200 hours for best protection.

Q4: Can it be used in saltwater?
Yes — it’s made from corrosion-resistant, marine-grade materials for all environments.

Q5: Why OEM instead of aftermarket?
Mercury’s OEM kits ensure correct fit and flow, using materials designed to last longer under marine heat and pressure.