Mercury – Quicksilver 817275K05 Upper Water Pump Repair Kit | MerCruiser Alpha One Gen II Sterndrives | 817275K05

Overview

Your cooling system takes a beating from sand, silt, and debris — and when flow starts to drop, your engine feels it. The Mercury 817275K05 Upper Water Pump Repair Kit restores strong, reliable water flow in your MerCruiser Alpha One Gen II sterndrive. This OEM kit includes everything you need to rebuild the upper pump assembly and protect your engine from overheating or impeller wear.

Built to Mercury’s factory standards, the kit’s components are precision-cut for a perfect seal and long-lasting durability. It’s the easiest way to keep your cooling system performing like it should — season after season.

Key Features

• Purpose: Repairs wear in the upper water pump to restore steady cooling water flow.
• Fitment: For MerCruiser Alpha One Gen II sterndrives.
• Kit Contents: Includes impeller, key, gaskets, O-ring, plates, water guide fittings, and upper housing.
• Installation: Fits directly and installs easily with common shop tools.
• OEM Quality: Designed to Mercury Marine’s original specifications for reliable cooling and protection.

Engine & Boat Compatibility

• Compatible with MerCruiser Alpha One Gen II sterndrives
• Commonly used in runabouts, cruisers, and fishing boats powered by MerCruiser engines

Performance & Practical Benefits

The 817275K05 kit restores cooling performance by repairing the wear caused by fine sand or debris circulating through the pump. A fresh impeller and tight-fitting housing ensure consistent water pressure and better cooling efficiency at every RPM.

The included gaskets and O-rings create a watertight seal that prevents leaks and maintains full suction. With OEM-grade materials, this kit resists corrosion and fatigue, helping you avoid costly engine repairs from overheating or low flow. It’s simple, effective, and built to last.

Why Buy OEM

Mercury’s OEM pump kits are engineered for marine use — exact fit, durable materials, and tested reliability. Aftermarket options may not seal properly or use subpar rubber compounds that fail under heat or pressure.

A genuine Quicksilver repair kit ensures everything fits as intended, flows properly, and stands up to the harsh marine environment. It’s the right fix the first time, with quality you can trust.

FAQ

Q1: What drives fit the Mercury 817275K05 kit?
A: It’s made for MerCruiser Alpha One Gen II sterndrives.

Q2: What’s included in the kit?
A: Impeller, key, gaskets, O-ring, plates, water guide fittings, and upper housing — all OEM parts.

Q3: How often should I service the water pump?
A: Mercury recommends inspecting it annually and replacing components every 2–3 years or as needed.

Q4: Can I install this kit myself?
A: Yes. With basic tools and a service manual, it’s a straightforward job for most boat owners.

Q5: Why use OEM parts instead of aftermarket?
A: OEM kits are precision-fit, durable, and designed for Mercury drives — giving you proper sealing, longer life, and better performance.