Fishplay, You have to buy Honda’s screw in Flush port adapter to use the Flush port on your kicker.
The Honda manual is correct in saying not to run your engines with the flush port connections, it will damage the impellers.
I bought Honda’s adapter for my big engine but I didn’t get the one for my kicker.
When I try and flush my kicker with the ear muffs the tattle tail stream is very weak so I don’t trust doing it that way. If I have to start my kicker here at home I have an 8 gallon pail that I use instead; the tattle tail stream is very strong doing it this way. If I have to start my 90 hp Honda at home the ear muffs work fine.
With all of the above said, I pretty much always flush my engines at the fresh water ramp 3 minutes from my home…I think they get a better flush..W.A.