littlelakeden
Cadet
- Joined
- May 2, 2010
- Messages
- 28
Hi everyone.I have a 1975 9.9 Johnson.I can't figure out why it is only running on one cylinder.It only runs on the top cylinder.So this is what I have done.Carb kit,points and condensers gapped .20,,new plugs gapped .30,compression is 68 both cylinders.I took the coils off and switched them and then pulled the plug wires again one at a time and the bottom cylinder still isn't firing.Both coils spark.I put the plugs against the block and they both sparked.Has anyone ever seen or had this happen to them.I can't figure it out.Thanks.