I have an 84 Merc 150. Today I was doing a few thing to winterize the motor. I noticed that after the motor has been in the up position for a while (30 min) and you tilt it down there is gas pouring out from somewhere on the motor. Looked at it a little and replaced a fuel line that looked damaged, but that didnt help the leak. Upon further inspection I removed the cover from the front of the carbs and noticed fuel leaking from inside the carb. Not sure from which part. When I tilted the motor up with the cover removed I noticed gas dripping from the bottom and middle carb. Does this mean I need to have the carbs rebuilt? While I have never had a carburetor apart and dont know much about them, I am able to learn and am somewhat mechanically inclined. Do you think a rebuild is a do-it-yourselfer? As always your advice and knowledge is appreciated.