Hey guys, i gotta 2004 4.3 mercruiser. It will crank but no idle.. If i keep the RPM's up (1800 at least) it will run fine. But as soon as i pull it back to idle, it dies. Anyone have this happen before? Need help... Saturday it ran fine, Sunday morning it didn't. I was docked in Destin Fl. (saltwater) Don't know if the salt makes a difference. 
