I did some research over on the Moyer A4 forums ....
So my questions to the experts on this forum are as follows:
With no offense to my fellow Sailnetters: I suspect you'll find more A4 expertise over in the Moyer Marine forums than here.
1) Since I have done no maintenance to the carburator since owning this boat should I just bite the bullet and take the whole mess off and give it a good cleaning (servicing where needed) even if I've never done this before?
Depends. Are you mechanically adept?
3) Is it likely that by using the carb cleaner through the flame arrestor/intake that I inadvertently got junk into the float ...
No. Not possible for something to get from the air intake into the float bowl when the carb is operating.
4) Is using carb cleaner a good idea in the first when the engine is running?
Other than potentially fouling the plugs: None of which I know. I never bothered, because I don't believe simply spraying carb cleaner down the throat(s) does all that much good.
That's all I have. I'm not an A4 guru and haven't had a carburetor apart in over 30 years. I wouldn't hesitate on ours, but I used to wrench on "old tech" engines all the time, back in the day