Permanent quick connect replacement for Mercury outboard flush ports enables fast, hassle-free installation and removal
Marine-grade construction with 316 stainless steel internals ensures durability in saltwater and harsh environments
Enhanced visual indicator at the top of the cap allows for quick check valve status monitoring
Improves on OEM cap design for easier detection of check valve issues
Compatible with both direct hose and Flushmaster systems for versatile use
Summarized by Shop
Flushing your Mercury outboard shouldn’t feel like a wrestling match — but if you’ve ever struggled with that impossible factory flush port cap, you know it often does.
Even on brand-new engines, removing the OEM cap is frustrating. It's wedged in tight, and many owners end up damaging or stripping it while trying to pry it loose with too
Material
Marine-grade plastic and 316 stainless steel
Compatibility
Works with Mercury outboard engines
Installation
Replaces OEM flush port cap with secure quick connect fitting
Makes flushing soooooo easy. Plug in hose while I’m putting the cover on the boat and by the time I’m done with the cover I disconnect and hop off the boat. Hassle free
M
Matt · Yesterday
Just like my first experience on the first purchase, you guys are truly professional no wasting time and I guess because I live in Florida. I get it quicker, but it was like overnight. I got the part I wanted you guys are great. I don’t know how what else I can get from you but if you’ve got it and I need it I won’t be buying it from you..
A
Anonymous · June 29, 2026
So much easier than dealing with the factory caps. Love them!