I use to have a 305 in my Seasport, now I have a 350 (carb), installed new a few summers ago. Neither engine has ever been able to "cleaning" get off the dock without stalling, the new motor is worse. This goes for leaving a cove in the morning, pulling anchor, and trying to take off without it stalling. Once I'm clearly able to crank it open outside the bay/cove, I can clean it out and she runs like a top all day, even shutting it on and off. It's the initial first day cold start, of a two day weekend.
(I basicly use the kicker to leave the habor, just easier than stopping/stalling over and over around the dock.)
Someone suggested turning up the idle (made no difference) another idea was "open the dog house" to let it get more air, haven't tried that yet.
(running the blower??? didn't do much either)
-Thanks for your thoughts