I had a powertorque screamer that defied me to no end.

I changed the crankcase ring, two manifold rings, rebuilt the carby and popped in a brass washer and new diaphragm, checked the hoses, and even replaced the head gasket. Still a screaming. I then got some whipper snipper cord, and cleaned out the venturi pipe on the engine block base, that the hose going from the carby fits in to. I also changed the front plate on the carby, with a new ring and a metal needle. After that, she started and ran fine with no screaming, and always started first go until I passed her on to the new owner.

Another thing, make sure the rubber boot for the kill switch, that fits into the back of the carby, hasn't perished. I have found this to be another airleak area.

Failing all the above, that leaves the bottom seal/bearing I guess, but you would have to love your mower to go all the way for that.

Maybe too much effort, but I am just a hobbyist that does it as I find machines, more to learn and have fun, so I don't make much money off the ones I sell. The ones I don't get too attached to anyway haha.

I may have also changed the poppet valve to "A" as well, as I read in some old manual that this certain model of powertorque use this setting. Or maybe I am getting this mixed up with another PT I did this to.

Anyway, happy hunting.

Last edited by Sapper; 04/04/23 02:10 AM.