Wildlifedesigner
Seaman Apprentice
- Joined
- Sep 3, 2003
- Messages
- 47
Okay I have a 40Hp merc 5992846, year 1980-83, Thunderbolt ignition. While timing I found out was only running off 1 cyl. Occasionally I would get spark off and on. I pulled the mercury switch, and coil then cleaned off grounds, also tapped on the switch a few times. Put it all back together checked out the timing and both cylinders had spark. I ran the moter for a while and it ran great. <br />I would turn it off and on checking other things else out. Checked timing again to find out it would go back to one cyl, then back to both, basically inconsitant spark on one plug. Anyone know what I should do next? thanks Bryan