1) Definitely has a steady stream of blue spark. I used a plug from a known working engine.
2) I did the blade plate test and the engine definitely didn�t bounce off when compression was found. I suspect lower than anticipated compression in this instance. Is 100PSI on the low end of the scale?
3) I installed a brand new spring on the governor from a known working engine. When the speed control was set to minimum, the throttle butterfly lever was just about closed. When I moved the speed control to maximum the throttle butterfly hardly moved (only ever so slightly)
4) Done
5) Done � throttle butterfly was not wide open though.
6) No change
Bad news � I thought the starter was dodgy giving me the odd clunking type sound so initially I didn�t really worry about it until I got the engine running reasonably well.
Lets just say after watching one of Joe Carroll�s video�s on YouTube, I confirmed the engine has quite a bad knock. Funny thing is that its exactly the same mower as Joe blew up in the video.
Why it will not fire still is beyond me although the lack of compression seems likely. I tried another working 4 stroke and the blade plate bounced back as you indicated.
Worst case this turns out to be a parts mower but I have learnt a few good tricks along the way. If you think its worthwhile looking into further for the experience I�ll await your advice.
