ORIGINAL: w8ye
Check your WT-76 for wear around the throttle shaft pivot area. it could be leaking there?
Is this a throttle couple spark advance engine ot a snchro spark version?
The reason I ask is that the TCA version has more mechanism up front to control the timing. It might put more wear on thr thr throttle shaft?
I have the snchro spark version with the wt465A carb. If it has a leak around the throttle shaft
there is no way to repair it and have to replace the carb.
Stick2K