Hi Jay
My mower is a 1974 VC160 Mark 3 mower so it has the old metal G3 carby on it. I think the bottom seal is leaking as it looks a little wet when you look at it. I always start the mower with the snorkel on as it is gutless without it. Would a leaking bottom seal cause all ot these problems?
Also the carby is fine as it is in new condition and very clean.
Look forward to hearing back form you.
