So - had my boat worked on in early September. Had a back injury/surgery which was very unplanned and just now able to pull the starter rope on the motor. Because of this the fuel has sat. The motor starts up fine but the idle is very high and the adjustment makes no difference (i.e. no change in idle at all). I'm guessing there's something very small in the carb and needs to be cleaned. I'd prefer not to pay for someone to work on the carb again. Any suggestions on a product that may help? (something that can be added to fuel). There are a lot of product that claim to work - didn't know if anyone has a suggestion... Thanks.