I chased an intermittent starting issue and it turned out to be one of the automatic compression releases.

 

Just thought I'd let you know I finally got my no spark issue figured out. After throwing a bunch of parts at it I finally did what I should have done sooner. A compression check. Turns out front cyl was fine but rear was only 30psi with the auto compression release engaged and about 60psi with them disconnected. I shortened the pushrods in the rear cyl 2 flats and now compression matches the front cyl and she starts every time. Rookie mistake I guess but not sure why sometimes it would start and others it would not. When it would start it ran great. A little confusing but at least it's fixed. Thanks for your help with this.....