Flushmaster Flush Port Quick Connect For Yamaha Applications, SM-FMQCY

The Flushmaster FMQCY  is a marine-grade quick-connect adapter kit by Flushmaster designed to permanently replace the factory flush port connector on Yamaha outboard engines. It eliminates the need to unscrew and handle loose OEM flush plugs over the water, allowing you to snap a garden hose or flushing system directly onto the engine.

Product Overview

• Compatibility: Fits Yamaha 2-stroke and 4-stroke outboards from 150 HP to 425 HP equipped with a factory flush port. Does not fit 50–115 HP models, 2024–2025 engines 115 HP or smaller, or Yamaha XF450 models.
• Included Parts: Includes two female quick-connect adapters and one double O-ring male quick-connect adapter per kit (one kit required per engine).
• Materials: Built with UV-resistant marine polymers and a 316 stainless steel internal spring to prevent corrosion and seizing in saltwater.

Key Features & Installation

• Permanent Bridge Design. Unlike standard hose adapters that you remove after flushing, the Yamaha kit stays snapped together while underway. This keeps the flush line secured to the cowling deadhead and maintains an airtight seal just like the factory setup.
• Double O-Ring Seal. The male adapter features double O-rings to prevent water leaks during flushing and eliminate air leaks while the engine is running.
• Simple Setup. Unthread your existing Yamaha flush port, thread the new female quick connect onto the male side, and thread the new male quick connect into the female engine side. Attach the second female quick connect to the end of your garden hose or Flushmaster controller hose.
• Standalone or Automated Use. You can use the SM-FMQCY manually with a standard garden hose. It also pairs with automated Flushmaster Controllers (2-outlet or 4-outlet) to flush multi-engine setups sequentially.