I have established that fuel starvation is the problem. I bought a carby repair kit for the Walbro WT 749A carby and pulled it down for cleanup and repair. Found some grit in filters and jets. Blew all idle jets, mixture control passages and similar clear with carby cleaner and comp air, but main jet is blocked solid and no amount of carby cleaner injection or comprssed air application has cleared it. This jet is a brass unit pressed (not screwed) into the venturi opening. I have tried pressing it out with a screwdriver blade, but so far no go. Further, I have not yet been able to find a replacement jet block either as an individual part or as part of any repair kit. The number stamped into the brass jet block is 34, presumably a bore reference? Am I now up for a new replacement carby? If replacement jet blocks are available, I would drill out the block, remove with an "easy-out", pop in a new one for a fix. At the moment I am stuck.
Any advice would be most welcome.
Thanks in advance.
mustang
