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
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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 · September 16, 2026
Product worked as expected, however QC needs to inspect better. Ordered 2 separate systems for 2 different motors. One did not have the required O-ring so it leaked. Had to purchase an O-ring to make it work.