My dad bought a Waltons store brand mid arch Celestial 160 in the late 1970s V177 code and it had the G4 carb with no prImer. He took it to a mower shop a few years later because it wouldn't start.
It came back with a white primer cap fitted as per the 1978 bulletin instructing such fitment to mowers brought in for any attention to the carburettor.
That mower was what I considered a reliable mower like you consider a vehicle reliable. You knew it would start by the second or third pull (it would never start first pull) and get the grass done. It sadly didn't get much use in it's first half of life as my dad was a bit yearly mower if that!! Only when I became old enough to operate it, did it come out od the shed far far more often!


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!