Quote Originally Posted by Lakeside09 View Post
Yes it is Fuel Injected... Where would I look to check to see if it is the air idle control? Is this expensive to fix... If that is the problem?
The Idle Air Control is usually right at the intake plenum. it is basically a solenoid valve that opens and closes to allow a small amount of air past the butterfly to keep the motor running. It will be a small device with a wire, (maybe two) that is bolted right to the side of the intake, under the spark arrester.

The redneck/shade-tree way to check it is to tap on it with the handle of a screwdriver, not too soft as to do no good, but not so firm as to break it. If the IAC is acting up, many times banging on it will loosen it up enough to get it to jump to a smooth idle. It will then probably rtun fine until the next time you shut off the boat and let all systems go cold, then the motor will run rough at idle.