Okay, that makes sense. Mine also has a rotor set screw in it as well. I didn't see that on your motor. Hey, by the way, I bought a NIB 60FSR on Ebay last week for $91.00. As for the carb problem, I think he has a fuel inlet problem. I have a gut feeling that the needle valve is worn-out or the Rotor is worn out. He might try a little piece of tubing on the needle valve to stop a possible air leak there. I wish he would ship me the motor so I could fix it. I think I'm one of few people that still have parts for that motor. Anyways, it getting late and I have to be at work at 6:00 am. So we'll talk later.... Bob