I have been having problems with a 2hp evinrude i got. I could not get it to run very well at all. It would run for a few minutes but i would have to feather the joke to get it to run that much. Then it would die and wouldnt restart untill several hours later or maybe the next day. I disassembled the carb. Cleaned it up and got the mixture screwes all out of whack. I would try to adjust them, but could not get it to run consistent or stay running very long. I was just about to give up on it when I noticed a little four letter word on top of the gas cap... VENT... i gave it a turn and it popped up... It started back up and ran. I adjusted the mixture screws and it runs great. Thanks to all of those that helped. I really learned some things with this ordeal...