Mercury – Quicksilver 8260531 Water Pump Housing | Mercury 25HP EFI, EFI Jet & 30HP EFI 3-Cylinder Outboards | 8260531

Overview

Your cooling system is only as strong as its housing. The Quicksilver 8260531 Water Pump Housing is a direct OEM replacement for Mercury 25HP EFI, EFI Jet, and 30HP EFI 3-cylinder outboards (serial numbers 0R106999–1R162636).

Built from tough, reinforced nylon, this housing holds up against heat, pressure, and vibration to keep your engine’s water pump performing at its best. Whether you’re replacing a cracked or worn housing, this OEM part restores proper water flow and protects your engine from overheating.

Key Features

• Purpose: Replaces a worn or damaged pump housing to restore efficient cooling and steady water flow.
• Material: Made from reinforced nylon for strength, heat resistance, and long-term durability.
• Performance: Maintains factory-level cooling efficiency and water pressure for dependable engine operation.
• Design: Precision-molded OEM part engineered for a perfect fit in Mercury EFI and EFI Jet systems.
• Ease of Use / Install: Direct-fit replacement installs quickly with common tools — no modification required.

Engine & Boat Compatibility

• Mercury 25HP EFI and EFI Jet outboards (serial 0R106999–1R162636)
• Mercury 30HP EFI 3-cylinder outboards (serial 0R106999–1R162636)
• Commonly used on aluminum fishing boats, small bay boats, and jet-drive setups

Performance & Real-World Benefits

The 8260531 housing restores proper alignment and sealing in your water pump assembly, ensuring steady cooling flow to protect your engine. A cracked or warped housing can lead to leaks or reduced pressure — this OEM replacement brings performance back to factory standards.

Its reinforced nylon construction resists corrosion, heat damage, and impact, making it ideal for long-term use in salt or freshwater. It’s an easy, reliable fix that helps extend the life of your entire cooling system.

Why Choose OEM

Mercury’s OEM parts are molded from high-strength materials designed specifically for your outboard. Aftermarket housings can distort or fail under heat and pressure, causing performance issues.

A genuine Quicksilver housing guarantees perfect fit, consistent cooling performance, and factory-grade protection — the same quality Mercury engineers intended.

FAQ

Q1: What engines fit the Quicksilver 8260531 housing?
A: It fits Mercury 25HP EFI, EFI Jet, and 30HP EFI 3-cylinder outboards (serial 0R106999–1R162636).

Q2: What’s included?
A: One reinforced nylon water pump housing.

Q3: Can it be used in saltwater?
A: Yes. The reinforced nylon is resistant to corrosion and salt exposure.

Q4: Is it hard to install?
A: No. It’s a direct-fit replacement that installs with standard hand tools.

Q5: Why OEM instead of aftermarket?
A: OEM housings are molded to exact Mercury tolerances for better durability and leak-free sealing.