Harry are you saying you removed the decomp and obviously put a spark plug in the hole. If you can start it like that it needs new rings, it should give a big kickback
You are probably on the right path, as I didn't think it would give me a kickback.
More info.
Day 2 later on,
As I was getting nowhere. I decided to pull apart the Carby and see what was happening.
Upon re-installation I found it was jamming on the Kill switch Pin. This originally occurred quite a while ago before I got it working but didn't think it was an issue now.
After trying to adjust the throttle cable and throttle cable screw (near Filter housing), I decided to leave it out. But leave the Kill switch hole open.
After Priming 5 times and pulling the pull cord 3-5 times it would start but now rev up to 4200 rpm.
So , I get the feeling it has some thing to do with the Carby and Throttle Cable setup and compression.
But I am about to give up, i think it is beyond me. I don't know what to do next.
And as I have an older green base 2 Stroke Lawnmower, I am better off pulling the old green base Motor and installing it on the newer Victa base/Covers with its 4 Blade setup. This motor always starts first try and doesn't give me any issues when hot.
Thanks
Harry