Alec,
I ran the boat today in my driveway and it seems to run smooth even at higher RPM's I can't seem to recreate the problem I was having at the lake. Although I did notice that the hose that ties in to my Valve covers to create the vacuum to the carbs air filter what it does I'm not exactly sure but I'm assuming that it is to draw off any vapor that might be seeping through. Since the hose was disconnected I was wondering if the motor wasn't flooding out or possibly vapor locked which could be the reason why it would only idle or at low speeds. If that didn't fix the problem then I'm afraid that there is an issue in the lower unit which was just rebuilt 2yrs ago. If the issue only arises with a load behind it then I don't suspect it to be fuel system related. Possibly a cut off switch some where in the shift cable?????????
Let me know if I'm on a right track I will get the fuel pump switched out wouldn't hurt anything and it's cheap
The fuel filter is brand new as I just got the boat De-winterized
Thanks for your help.
-Brad