CAPTKEV85
Petty Officer 1st Class
- Joined
- Mar 12, 2008
- Messages
- 229
mercruiser 470 Had a great day on the water. New head and gasket. My overheating issue is finally gone. But I ran the boat for about 2 hours at 3200 rpms cruising. Then came into the canal and she was running a little rough. I know 470's idle for crap. So I decided to go out again and once I plain off there was a little sputtering, and breaking up while wide open. any Ideas?