I have a 1994 Mercury 75 hp motor on my pontoon. I need to know where the idle is to adjust. It starts fine and idles fine but as soon as I go to put it in forward or reverse it stops running. That only if I go slow. If I push down on it into gear then it will run like a top, its just that little spot that it will quit running. Is it even the idle that I need to adjust. Thanks for all the help and info given.