Hi BKS,

You might want to check to see if the throttle servo is moving in the right direction. You may need to use the servo reverse switch. Be sure to recheck the travel of the carburetor to make sure you have full movement without stalling the servo. You should also make sure your carburetor is closing fully. There should only be a small opening with the barrel closed or the butterfly valve nearly shut (which ever is applicable). If not you will need to adjust the idle stop.

Be aware that if you running a direct drive between the engine and propshaft, the idle will have to be fast enough so that when you put the boat into the water, the engine wont stall. Some guys will actually pitch the boat into the water to keep the engine from stalling. If the boat is big or you are just begining you might want to go with a clutch on your engine so you dont have to idle it so high. You might want to try the boating forum elsewhere here for more help.

There should not be fuel leaking from around the base of the cylinder. You may have a loose cylinder or a blown cylinder base gasket if one is used.

Good luck
Carlos G