wings,
Bottom line is this; it's getting too lean for some reason. Just 'cause it's got JB Weld on it doesn't mean it's shot, heck I got a couple of those, including my 4 stroke!
I was serious about the offer to send it to me, for a free repair, I'll even pay the postage to send it back. I've got more engines than I know what to do with, including two of these evo's, so I'm not going to scam you. I think there is a 95% chance I'll be able to get it going for you, send me a PM if interested.

Jetts