Reply To: 1958 Johnson 10 hp Model QD 19 Cam issues

[RetiredGunny]

Retired Gunny here. I read this post because it is so close to what I’ve been watching the last few days. Here are my observations. When I use the timing tool, I notice that the points would start to break prior to TDC. My conclusion here would be that this should be the beginning of the break allowing the spark during the 46 degrees shown above. I’ve noticed that at TDC, the points are opened. however, the timing marks do not line up correctly.

I don’t think that your cam is worn, you would have to have a really noticeable groove in there that would take years of continual motion to accomplish, I thought that myself, no evidence on the cam of any wear.

I have matched the timing tool to the flywheel marks, after all, all you are doing by using the timing tool is replacing the flywheel for easier accessibility and visibility. Myself, I’ll use the timing tool and the multi-meter watching for continuity versus watching the gap.

These are just my observations from the last few days, glad I’m retired and have nothing better to do with my time.