I have a GW 232 with twin 150's. The starboard motor has no top end. The max RPM I can get is 44 and that is by throttling up and down, if I just leave it wide open I get about 38 RPM's. Here is what I have done so far. I have both engines pulling from the same tank to eliminate the fuel as an issue. I swapped the primer balls between both motors, problem not fixed. Fuel injector assembly was removed and the fuel injectors have been cleaned and replaced the very small fuel filter near the injectors. Replaced the hi and low fuel pumps. All cylinders are firing correctly and the engine idles perfectly. Any thoughts or suggestions on what to do next?