30-Day Performance Guarantee – Flush Motors, Not Time!

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See the flushmaster system in action

FLUSHMASTER

Comes With
  • (2) Female Quick Connects - black
  • (1) Male Quick Connect (Double O-Ring to ensure no leaks)
Product Installation
  1. Unthread your Yamaha flush port.
  2. Thread in your new Flushmaster female quick connect on the male side.
  3. Take your new Flushmaster male quick connect piece and thread it into the female side of the Yamaha flush port.
  4. Attach the second Flushmaster female quick connect to the end of your water supply.
Product Compatibility

Compatible with: Yamaha Outboard Engines 150 - 425hp (with a flush port)

NOT Compatible with:

  • Any 2024 or 2025 engines that are 115hp or smaller
  • Yamaha Outboards 50 - 115hp or 450hp

Product Details

close up of a suzuki boat engine

Durable

Made with marine-grade materials, we designed our quick connects to be strong and durable. Tested rigorously to ensure performance and longevity.

mercury boat engine running with sunset

UV Tested

Our product is made with UV-resistant materials to protect from damage whether you're cruising under the sun or braving rough waters.

a leak free prod for the flushmaster system

Leak-Free Performance

Our Flush Port Quick Connects are engineered with a double O-ring design that ensures a tight, leak-free seal every time. Note: Yamaha and Honda models feature double O-rings in the male segment while the Mercury and Suzuki feature a proprietary design with one O-ring each in the male and female segments.

Close-up of quick connect flush port for Suzuki outboard engines, highlighting secure attachment and durability.

Female Quick Connects

FLUSHMASTER offers the only marine-grade female quick connect available on the market. Designed with a marine-grade 316 stainless steel (SS) spring, this quick connect is built to resist rust and corrosion. No other female quick connects on the market are made to this standard.

Hassle-Free

No more wasting time screwing around with your OEM flush port plug. Our Flush Port Quick Connect permanently replaces the OEM, giving you convenience instead of a headache.

Saves Time

Get a quick connection every time you go to flush your outboards. Twist off the cap, connect the hose, flush, disconnect, and twist the cap back on. It’s that easy!

Customer Reviews

Based on 34 reviews
91%
(31)
3%
(1)
3%
(1)
0%
(0)
3%
(1)
N
Nancy Battaglia

Did an amazing job. Easy to use on my Yamaha 300. First time boat went out in Gulf and flushing was easy with this.

A
Arthur Picchione
Easy peasy

Thanks for making it easy to flush the engine without worrying about losing washer or stripping port

J
John Lamberton
Flushing made easy

Flushing is so much easier. No more screwing and unscrewing in the hot sun after a long day in the water. It’s easy and fast.

B
Bradley P Childs

Great product. Works as advertised and has made flushing much easier!

C
Camille Kodsi

Easy to install, very practical