I went through the carb again and now i can get it to idle and throttle up but i have no high RPM under a load. It sounds like it is really struggling to move the boat. It makes no differance if i have the choke on or off. it is still the same. In neutural it will rev. but has poor throttle response. Any suggestions. low speed needle is 1 and 1/2 turns out. it has an automatic choke and no high speed needle to set.