Another silly question, what sort of air gap have you set it at 10 thou or about that? I do have a few motors here pre powertorque with plastic carbs, but I have never even looked at any of them,I like the powertorques so I concentrate on them. There is no point in pulling a motor till it exhausts you, they will either start or they won't. The beauty with the powertorques is spark on them is usually very good and rarely gives trouble