Well here is the final post on this thread!
I got her all back together. Started it and it was crazy lean. Stripped carb cleaned and rebuilt. Over and over. With help from trains the conclusion was to direct attention towards a leak in throttle shaft, as I told him I checked it all - screws, metering height, low circuit clear, H circuit clear,new diaphragm/ and gaskits. Tested fuel and fuel filter, tank vent, pressure and vacuum engine and manifold. We did a few tests and found out it did draw air there.
I tried with grease and oil to block it, no change. Strange but proceeded to strip and rebuild carb carefully counterboring each seat for the o-rings. Found and modified washers the throttle shaft and L & H screws, adjusted the throttle shaft spring to increase its resistance one turn to compensate for friction.
No change.
hmmm... over I went with the checks in the carb. Tested the low circuit 3 times and then finally on the third test I noticed one of the idle drilling’s didn’t release any fluid! So hard to notice because the other two were spraying carb cleaner so violently it was hard to see each idle drilling clearly.
Couldn’t clear it. I was previously so a certsin it was clear, but clearly, I needed to look closer, and wear goggles at the same time to avoid carb cleaner in the eyes! After going back to Trains for advice on how to clear it I finally popped the Welch plug of and realised that when I removed the Welch plug the first time for the deep clean, I managed to perfectly tap a plug of metal into one of the Idle drilling’s as I passed the Welch plug and hit the carb itself yet didn’t notice it at the time!
(Bottom hole - notice it’s plugged and although looks superficial it’s half way down the idle drilling)
the only way I could get it out was drilling.
I went shopping for tiny tiny drill bits and a dremel drill station. Set it all up, found the right drill bit (0.5mm) and super carefully aligned the drill and gently touched the plug and it instantly released. I didn’t go all the way through, so even if 0.5mm wasn’t perfect it didn’t affect fuel flow.
so there we have it, 3 clean drilling’s once again.
a massive thank you to all of you who helped me on this project, especially to
@trains this build wouldn’t be what it is if it wasn’t for his guidance and dedication to helping me throughout. I’d imagine we spent 10 hours plus of cumulative time talking about this saw on the phone and sharing of his advice as well as
@pioneerguy600 for too giving me advice and guidance , I probably would have caught a ring on that chipped cylinder lining and destroyed it as well as all the other advice he has shared.
it was dark by the time I filmed the video, but you can hear the tune
its alive and kicking and singing its beautiful 2 stroke song