More horrible sticky humid weather than hot outright. I never used the mower for very long at a time and it was mostly shady conditions. It's most likely the carburettor. There is a long fuel line to the relatively high position large fuel tank. The combination if the high position, large amount of fuel pushing downwards and the long fuel line containing more fuel then a domestic fuel line, may all be contributing to high fuel pressure forcing it's way to the crankcase when the tap is on.
Out of interest that may be related to fuel pressure, here is an LM carburettor on a utility wreck I found and there is a plastic tab on the primer cap. I wonder what this signifies? A needle and seat made for higher gravitational pressures from the large handle mounted fuel tank perhaps? I have never seen this before, not even on another utility with big tank I had that never gave this trouble.
Last edited by Mowerfreak; 19/01/2206:35 PM.
Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!