i have a excel 225 2 stroke on my cabo 216. it idles fine and runs great at wot. the problem is when i put it in gear and throttle it will stumble blubber and then die. if i hit the choke switch after i put it in gear it seems to clear itself and then run. i changed the fuel line to the engine,new prime bulb and cleaned the filter at the motor. no help! i was thinking maybe a bad fuel pump or a piece of crud in one of the carbs. i could sure use some help. anybody have any ideas? thanks in advance and hope to hear back soon.