I have a 1977 Mercruiser 255 (GM) that has a sporadic rough idle and will randomly stall (both in neutral and in gear). If the RPMs are at 1,000 or above I have no issues. The engine accelerates good and has a good throttle response.
The cap, rotor, and fuel filter were replaced last summer. The plugs and wires were replaced last week. I also cleaned the spark arrestor and sprayed some carb cleaner in the carb and nothing changed.
This is the port engine and the starboard runs fine. Before I started changing more and swapping parts I thought would ask this forum for some advise. I have a video that I'm going to try to attach.
The cap, rotor, and fuel filter were replaced last summer. The plugs and wires were replaced last week. I also cleaned the spark arrestor and sprayed some carb cleaner in the carb and nothing changed.
This is the port engine and the starboard runs fine. Before I started changing more and swapping parts I thought would ask this forum for some advise. I have a video that I'm going to try to attach.