Mercury – Quicksilver Water Pump Impeller Repair Kit | Cooling System Component | Complete OEM Kit | 42038Q3

Overview

A reliable cooling system is vital to your outboard’s performance, and the Mercury Marine 42038Q3 Quicksilver Water Pump Impeller Repair Kit gives you everything needed to keep it running cool and efficient. Designed for Mercury and Mariner 6–15HP TwoStroke and FourStroke outboards, this all-in-one OEM kit includes the impeller, gaskets, face plate, drive key, and water tube guide — everything required to restore your water pump to factory performance. It’s a complete, easy-to-install solution for dependable cooling, season after season.

Key Features

• Purpose: Rebuilds your water pump to maintain strong, steady cooling flow.
• Contents: Includes impeller, face plate, gaskets, drive key, and water tube guide.
• Material: Made from marine-grade rubber and corrosion-resistant metals for long-lasting durability.
• Performance: Provides consistent water pressure and higher flow rates to protect your engine from overheating.
• Ease of Use: Designed for straightforward installation using standard tools.

Engine & Boat Compatibility

• Mercury and Mariner 6–15 horsepower TwoStroke and FourStroke outboards.
• Common on small fishing boats, aluminum runabouts, and portable outboards.
• Works in both saltwater and freshwater environments.
• See your owner’s or service manual for specific serial number compatibility.

Performance & Practical Benefits

The 42038Q3 repair kit restores proper water circulation by replacing worn components that reduce cooling efficiency. The flexible impeller provides steady water flow across all speeds, while new gaskets and seals eliminate leaks that can cause pressure loss.

By rebuilding your water pump regularly, you’ll maintain optimal cooling, prevent overheating, and extend the life of your engine. It’s a simple bit of maintenance that pays off in smoother operation, better performance, and fewer costly repairs later on.

Why Buy OEM

Mercury’s Quicksilver 42038Q3 is a genuine OEM kit, engineered to fit perfectly and perform reliably. Aftermarket kits can vary in size, material quality, or component design, which can lead to poor sealing or reduced water flow.

Mercury’s OEM parts are tested under real marine conditions to ensure proper cooling pressure, flexible impeller performance, and long-term durability. With OEM, you get confidence that your cooling system works the way Mercury intended — reliable, efficient, and built to last.

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 includes the impeller, drive key, face plate, water tube guide, and all gaskets needed for installation.

Q3: When should I rebuild my water pump?
Replace the impeller and inspect the pump every two seasons or 200 hours of operation, whichever comes first.

Q4: Can it handle saltwater?
Yes — all parts are corrosion-resistant and suitable for both fresh and saltwater environments.

Q5: Why choose an OEM kit over aftermarket?
OEM parts fit exactly, maintain correct water flow, and last longer, ensuring your engine stays cool and dependable.