Mercury – Quicksilver Blue Plastic Drain Plug Kit | For MerCruiser Engines | 806608Q01

Overview

When it’s time to drain your cooling system or prep your boat for winter, the Mercury Marine 806608Q01 Quicksilver Blue Plastic Drain Plug Kit makes the job simple and mess-free. Designed for MerCruiser sterndrive and inboard engines, this plug fits your cylinder blocks, exhaust manifolds, seawater pumps, and hose drain ports perfectly. It’s built from corrosion-resistant plastic that stands up to saltwater and heat, and its bright blue color makes it easy to spot and remove when service time rolls around.

Key Features

• Purpose: Provides quick, reliable water drainage during maintenance or winterization.
• Construction: Made from durable, saltwater-safe blue plastic that resists cracking and corrosion.
• Seal: Includes a rubber O-ring for a tight, leak-free fit.
• Design: Bright blue color for easy visibility in tight engine compartments.
• Fitment: Designed to meet or exceed OEM specifications for MerCruiser engines.

Engine & Boat Compatibility

• MerCruiser sterndrive and inboard engines
• Works with:
• Cylinder blocks
• Exhaust manifolds
• Seawater pumps
• Water hose drain ports

Performance & Real-World Benefits

The 806608Q01 drain plug kit simplifies one of the most important parts of boat maintenance — removing water from your cooling system. Whether you’re flushing after a long day on the water or preparing for off-season storage, this plug drains cleanly and efficiently.

Because it’s made of marine-grade plastic, it won’t corrode, seize, or strip threads like metal plugs sometimes do. The included O-ring ensures a solid, watertight seal that prevents leaks. It’s a small upgrade that saves time, keeps your cooling system dry, and prevents unnecessary wear on internal components.

Why Choose Mercury OEM

The Quicksilver 806608Q01 is a genuine Mercury Marine part, built to last and perform exactly as your engine requires. Cheaper aftermarket options often use inferior plastics that can deform or crack under temperature changes.

Mercury’s OEM plug is engineered and tested under real marine conditions for perfect fit and reliable sealing. It’s the same plug Mercury technicians use for their service jobs — durable, dependable, and easy to work with.

FAQ

Q1: What engines does this fit?
It’s designed for MerCruiser sterndrive and inboard engines, fitting drain ports on the block, manifold, or pump.

Q2: Does it include the O-ring?
Yes — the kit includes a rubber O-ring to ensure a proper seal.

Q3: Why is it blue?
The bright blue color helps you quickly identify the plug during service or winterization.

Q4: Can it be used in saltwater?
Absolutely — it’s made from corrosion-resistant plastic that holds up in any water type.

Q5: Why choose OEM over aftermarket?
Because Mercury OEM parts are tested for exact fit, strength, and reliability — giving you the same performance as your original setup.