Flushmaster Flush Port Quick Connect f/Mercury - White

Seamule Flushmaster Flush Port Quick Connect f/Mercury - White

The Flushmaster Flush Port Quick Connect for Mercury outboards permanently replaces the factory OEM flush port plug with a marine-grade quick-connect fitting engineered for fast, reliable, and leak-free engine flushing. Designed with the exact thread pitch required for most modern Mercury outboard engines, this fitting eliminates the common frustrations of stuck caps, cross-threaded connections, and time-consuming hose hookups — reducing post-outing maintenance to a matter of seconds.

Constructed from UV-stabilized marine polymer with 316 stainless steel internals, the Flushmaster is built to withstand repeated exposure to saltwater, UV radiation, and harsh marine environments without seizing, corroding, or leaking. A high-quality O-ring provides a watertight seal, while the heavy-duty quick-release sleeve allows one-handed hose attachment with no tools required. The high-flow design maintains maximum water volume and pressure, ensuring fresh water reaches the thermostat and the furthest reaches of the engine block during every flush cycle.

Works seamlessly with the Flushmaster automated outboard flushing system or as a standalone direct hose connection for any standard garden hose. Backed by a 30-day guarantee and 1-year warranty.

Key Features

• Permanent, leak-free upgrade to the factory Mercury flush port — no more stuck or cross-threaded caps
• Mercury-specific threading designed to match the exact thread pitch of most modern Mercury outboards
• One-handed, tool-free quick-release sleeve for fast hose attachment and removal
• High-flow design maintains maximum water pressure to flush the entire cooling system
• 316 stainless steel internals with marine-grade springs and seals that resist saltwater corrosion
• UV-stabilized marine polymer construction in white for a clean OEM-style appearance
• Integrated high-compression O-ring for a watertight fit during operation
• Compatible with the Flushmaster automated flushing system or direct garden hose connection
• Simple installation — replaces OEM flush port in minutes using the included wrench
• Includes 90-degree elbow to prevent hose kinks inside the engine cowling
• 30-Day Guarantee, 1-Year Warranty