Mercury – Quicksilver Water Pump Repair Kit | Cooling System Component | Complete OEM Kit | 42089A5

Overview

Keep your outboard’s cooling system running at its best with the Mercury Marine 42089A5 Quicksilver Water Pump Repair Kit. Designed for Mercury and Mariner 6–15HP TwoStroke and FourStroke outboards, this comprehensive kit includes everything needed to rebuild your water pump and restore proper cooling performance. Inside, you’ll find the impeller, pump housings, face plate, gaskets, seals, and o-rings — all built to Mercury’s exact specifications for reliable, factory-quality performance. Whether your pump is worn from use or clogged with debris, this kit brings your cooling system back to life.

Key Features

• Purpose: Fully restores water pump performance for efficient cooling and engine protection.
• Contents: Includes impeller, upper and lower housings, face plate, gaskets, seals, and o-rings.
• Design: Built to Mercury OEM standards for precise fit and reliable sealing.
• Compatibility: Fits Mercury and Mariner 6–15HP TwoStroke and FourStroke outboards.
• Performance: Delivers strong, consistent water flow to prevent overheating and maintain smooth operation.
• Ease of Use: Direct replacement kit for factory water pump — installs easily with common tools.

Engine & Boat Compatibility

• Mercury and Mariner 6HP–15HP TwoStroke and FourStroke outboards.
• Common on small fishing boats, inflatables, aluminum runabouts, and portable engines.
• Safe for use in freshwater and saltwater environments.
• Recommended for regular maintenance or when servicing the impeller or housing.

Performance & Practical Benefits

The 42089A5 kit restores cooling efficiency by replacing every key wear component in your water pump. The new impeller ensures strong water pressure, while the gaskets and seals prevent leaks that can lead to overheating. The included housings and face plate provide fresh, clean surfaces that promote smooth water flow and prevent wear on new parts.

Rebuilding your pump with this OEM kit not only protects your outboard but also extends its life and improves overall performance. It’s a cost-effective way to keep your motor running cool and reliable, season after season.

Why Buy OEM

Cooling systems rely on precision — and that’s exactly what you get with Mercury’s Quicksilver 42089A5. This is a genuine OEM kit, built and tested by Mercury for the specific models it fits. Aftermarket kits often use lower-grade materials or imprecise molds that cause leaks, uneven flow, or premature impeller wear.

OEM parts guarantee a perfect fit, proper pressure balance, and corrosion-resistant materials that hold up in marine conditions. With Mercury, you’re not just replacing parts — you’re restoring factory-level performance and peace of mind.

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 a water impeller, upper and lower housings, face plate, gaskets, seals, and o-rings.

Q3: When should I rebuild the water pump?
Rebuild your pump every 2 years or 200 hours, or sooner if you notice reduced water pressure or overheating.

Q4: Can it handle saltwater conditions?
Yes — all components are corrosion-resistant and marine-rated for both salt and freshwater use.

Q5: Why choose an OEM kit over aftermarket?
OEM kits ensure precise fit, balanced flow, and long-lasting materials that protect your cooling system.