1964 Johnson 18hp no spark to top cylinder.

[nathangormley]

I recently discovered that I am not getting any spark to my top cylinder. So I am trying to figure out how many of the ignition componets I need to replace. I was thinking at first the coil, contacts, and points. Should I replace the wires also, if yes what all do I need to order?

 

[JB]

Re: 1964 Johnson 18hp no spark to top cylinder.

You probably have a bad coil on that cylinder, Nate.

I hate replacing stuff just to find out if it needs replacing, l but I think I would replace both coils. They tend to go after 40-50 years.

Do that and test her before you start replacing stuff that may not need replacing.

Good luck.

 

[nathangormley]

Re: 1964 Johnson 18hp no spark to top cylinder.

OK I finally had time to replace the coil to the top cylinder and still no spark. I'm getting excellent spark to the bottom cylinder. Should I replace the plug wires next?? Also what wires should I order? Thanks

 

[blimp]

Re: 1964 Johnson 18hp no spark to top cylinder.

try swapping components from the working cyl to the one that is not getting spark, it'll help troubleshoot without needlessly replacing parts.

 

[lindy46]

Re: 1964 Johnson 18hp no spark to top cylinder.

If this were a new motor to me (no history) and I wanted to have a reliable runner, I would replace all the ignition components. Then I could rest assured I wouldn't have any problems with it. And all those components can be replaced for about $75-80. A cheap price for peace of mind.