Anyone ever had a screw come loose on the choke plate and put a hole in the piston on the intake side? It happened on a Jonsered 2040 turbo. Is this a consumer saw? The Zama carb was made in China. I also have noticed on my new Sthil that the Bosch spark plug is made in India and it wouldn't run the saw. I opted for a NGK and the little Stihl 250 runs great.:bang: