I've been dwelling on your reply since last night (even checked out the boat & specs etc - interesting starter - I ASSumed you had the ole' belt & 12 volt starter).

As for carb cleaning WD-40! However you can just leave some tubing on the carb and blow thru the needle to see if it is blocked.... my opinion is that isnt the problem (but go ahead and see, it will rule out 1 possibility).

As the boat ran well before you put it up for 2 weeks, you're right to start thinking some thing has changed/broken. And given it wont start now, I'm guessing it is lean .... cracked fuel line or not attached or sealing; header coupler (same things); fuel tank (same things) plus possible bad seal on tank's cap (if you have a plastic tank) or even one of the pick up tubes in the tank has come loose).