Mercury – Water Pump Repair Kit | 15–25HP 2-Stroke Outboards | Quicksilver | 85089Q4

Overview

Every seasoned boater knows that a reliable cooling system is the difference between a smooth ride and a ruined weekend. The Mercury Quicksilver 85089Q4 Water Pump Repair Kit keeps your outboard running cool and steady, delivering the confidence that your engine is protected no matter how long the day runs. It’s not the flashiest component, but it’s one of the most important — quietly ensuring your engine stays at the perfect temperature mile after mile.

Key Features

• Complete 8-piece water pump repair kit for thorough, easy maintenance
• Includes gaskets, o-rings, plates, impeller, and impeller key
• Engineered for 15–25 horsepower 2-stroke Mercury and Mariner outboards
• Built for high flow rates to maintain consistent cooling and prevent overheating
• Constructed with durable marine-grade materials for long service life
• Meets Mercury Marine OEM specifications for perfect fit and performance

Engine & Boat Compatibility

• Fits Mercury and Mariner 15–25HP 2-stroke outboard engines
• Ideal for tiller, fishing, and utility boats where reliability is key
• Commonly used on small runabouts, jon boats, and inflatables
• Designed for freshwater and saltwater operation
• Recommended for engines needing a full water pump overhaul rather than a simple impeller change

Performance & Practical Benefits

Your water pump isn’t just another part — it’s your engine’s lifeline. The Quicksilver 85089Q4 Water Pump Repair Kit restores that lifeline with every component you need to rebuild your cooling system right. The precision-molded impeller delivers smooth, consistent water flow through your engine, keeping temperatures stable and components protected.

You’ll feel the difference in the way your engine runs — smoother idle, stronger performance at higher speeds, and confidence when idling in shallow coves or long no-wake zones. Each part is built to withstand harsh marine conditions, from grit and sand to saltwater corrosion. The tight fit of the seals and gaskets keeps leaks at bay, while the durable materials resist cracking, warping, and wear.

Installation is straightforward. Most boaters with basic tools can complete the job in an afternoon. Once done, you’ll know your cooling system is solid — steady flow, proper pressure, and peace of mind when you head offshore or up the river again.

Why Buy OEM

When you buy a genuine Mercury Marine part, you’re investing in reliability that’s been tested on the water, not just in a lab. This part number 85089Q4 kit is designed specifically for Mercury and Mariner outboards, ensuring everything fits perfectly the first time. Aftermarket kits often cut corners with lower-grade materials or imperfect tolerances that can lead to early failures or poor cooling.

OEM means you won’t have to wonder if it’ll hold up when conditions get rough. It’s made to last, engineered for your exact motor, and backed by Mercury’s decades of marine innovation. If you want your engine to stay cool, strong, and dependable — this is the way to go.

FAQ

Q1: Which Mercury engines or systems does the Water Pump Repair Kit fit?

It fits Mercury and Mariner 15–25HP 2-stroke outboards, including standard and long-shaft models.

Q2: What makes this part different from aftermarket alternatives?

Mercury’s OEM kit uses marine-grade materials tested for pressure, temperature, and corrosion resistance, ensuring lasting reliability.

Q3: How do I know if this is the correct replacement for my setup?

Check your owner’s manual for part number 85089Q4 or match it to your current pump assembly for confirmation.

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

Yes — it’s built for both, using corrosion-resistant materials that handle long-term exposure to harsh elements.

Q5: Is installation straightforward for most boat owners?

Absolutely. With basic tools and a little patience, most boaters can replace the old components in an afternoon.