Mercury – Blue Plastic Drain Plug | For MerCruiser Blocks, Manifolds & Pumps | 806608K01

Overview

Routine maintenance shouldn’t be a hassle. The Mercury Marine 806608K01 Blue Plastic Drain Plug makes draining water from your MerCruiser engine block, exhaust manifolds, seawater pumps, or drain ports simple and mess-free. Built from durable, corrosion-resistant plastic, it’s designed to last through years of seasonal use. Its bright blue color makes it easy to spot during maintenance, and the included O-ring ensures a snug, leak-free fit every time.

Key Features

• Purpose: Allows for quick, easy water drainage during engine service or winterization.
• Construction: Made from tough, saltwater-safe blue plastic that won’t corrode or seize.
• Design: Includes a rubber O-ring for a tight, reliable seal.
• Identification: Bright blue color makes it easy to locate once installed.
• Fitment: Designed to meet or exceed OEM specifications for MerCruiser engines.

Engine & Boat Compatibility

• MerCruiser cylinder blocks
• Exhaust manifolds
• Seawater pumps
• Water hose drain ports

Performance & Real-World Benefits

The 806608K01 drain plug is a simple tool that makes a big difference when it comes to maintenance. Whether you’re winterizing or flushing the cooling system, this plug ensures a clean, controlled drain without the hassle of fighting corrosion or stripped threads.

Its non-metallic design stands up to saltwater exposure and won’t seize over time like brass plugs can. The O-ring provides a tight seal, preventing leaks and keeping water out where it doesn’t belong. It’s an inexpensive part that saves time, prevents headaches, and keeps your cooling system in top condition.

Why Choose Mercury OEM

The Mercury 806608K01 is a genuine factory replacement, built to the same standards as the original part installed on new MerCruiser engines. While aftermarket versions might look similar, many use lower-grade plastics that can crack under heat or pressure.

Mercury’s OEM plug is engineered for consistent fit, easy handling, and long-term reliability. It’s the part Mercury techs use themselves — because it works perfectly, every time.

FAQ

Q1: What engines does this fit?
It fits MerCruiser engines with drain ports on the block, manifold, seawater pump, or hoses.

Q2: Does it come with a seal?
Yes, it includes a durable O-ring for a watertight seal.

Q3: Why is it blue?
The bright color makes it easy to find and identify during maintenance.

Q4: Can it be used in saltwater?
Yes — it’s saltwater-safe and won’t corrode or stick.

Q5: Why OEM instead of aftermarket?
Mercury OEM plugs are made from high-grade materials that resist cracking, heat, and wear — ensuring reliable drainage and sealing for years.