I was hoping for some guidance on how to troubleshoot this issue I'm having.
I've got a Victa Powertorque that I rebuilt approx. 1 year ago, full carb rebuild, new O-rings all round, new head gasket. The only things I didn't touch were piston, rings, and main bearing seal.
The mower starts first pull and runs fine for half a tank, then it starts to surge and rev before cutting out. I'm suspecting that once it reaches a certain temp, there is an air leak causing it to run a bit lean and hot.
I have set the poppet valve to the low rev setting, this doesn't help as the issue isn't immediate.
Also, I can start it again immediately without any issues.
I've put a new plug in, which looks fine after a tank of fuel, not fouled or burnt. See pictures for plug condition after 1 tank of fuel.
