I have a 1989 3.0 Mercruiser that has a strange problem. The boat has ran fine the first 5 times it has been out this season however the last two times I have been out I have problems. It starts just fine and runs for 20 minutes at all rpm ranges just fine and then out of nowhere it just starts sputtering and dies. It has done the same exact thing both times. After the sputtering I can get it to start up and it will run for a few seconds and then sputter and die again. After the first instance I replaced the fuel pump and obviously that did not fix the problem. The boat has new plugs, wires and cap also. I guess I am leaning towards an ignition problem but I really dont know. Any advice would be appreciated.
