I have a 120hp inline 4cyl Mercruiser sterndrive. My problem is a idle problem. I had the complete outdrive rebuilt a year and a half ago. Rebuilt the carb last spring. Replaced the fuel filter last spring. I have the idle great out of gear. Runs good wide open but the thing won't idle when you put it in gear. I am thinking maybe the fuel pump needs rebuilt or another fuel filter. Just wandering if anyone has had that problem or have any suggestions that I might have missed. PS. I almost forgot. 1977 Mercruiser 120hp 4cyl. I also put new plugs wires, cap, rotor, points and condenser. Thanks in advance.