Hi Jeff,
I have tried every combination I possibly can. I was using my test carby that I just used on all the PT's I got running, that carby is my base starting point, I fit it to every PT that comes here, that tells me straight up if the motor will run or not. The owner asked me last night if I could fit one of the motors I just picked up but I told him it is not the motor but I'm 100% convinced it is in the pull start design and no point in me swapping any more motors to it, just wasting time, they are a dud design. I wish I knew why yours works so well
