Yes you have it,there are several styles and sizes of engine flusher cups,just identify which best fits your application.Then you can do your oil changes and simple maintenance at home.
I use muffs or the boat ramp (if it's not busy).
Problem with a can is the water gets full of air bubbles.
What ever you do, don't run it to fast, on muffs or a
can.
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Not all small motors take muffs e.g. my old 2002 Honda 8hp or my current kicker 1990 Merc 6hp. I had a 1986 Evinrude 15 hp that was flushed with muffs. Just check to see if your motor allows the use of muffs.
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