I'm thinking this is part of the problem. I have no idea where the missing piece is.
I've got a box of parts, do you want them?
I've got everything apart. The challenge, for me, will be not having leftover parts.
if you where closer i could get it running for you in it has compression......
I think it is a little low on compression...
grab the pull starter and hold if by it and let go of the saw.....if it falls on it's own it's low on compression or it should have 110psi or higher....