Logo

Mercruiser 5.7 won't fire, help please.

MSteinmann

New member
86 Carver, twin 350's. Starboard engine ( while running at about 1500rpm) engine was running rough and then the just shut off. I have changed coil, new breakerless points system. Thunderbolt 4 from port engine. First there was no spark. While checking it out I did get it to fire. New plugs, rotor and cap. No fire. While "checking" the wire from the harness to the coil, with meter, it shows 12 .68v. I have changes switches, and unhooked tach. Spark tester did show a nice blue spark and engine fired, Choke was closed so I opened it some and engine ran smooth again. Went back today, and no start. Spark test was back to red and weak. I changed plugs again as I felt I had it flooded. Engine did try to run while spinning starter. but no luck. I have talked to everyone I know, who have said' You have done everything that I know to do to it" Can anyone help with this?
 
Back
Top