I have a jc 28cc. didnt even have a gallon of fuel thro ran thro it and the side of the piston cracked and broke off,by looking at it it looked like a bad spot in the casting of the piston . finnaly found a replacement piston but its not the same as the one that shelled out it has a single ring on the piston ,the one that came out of engine has 2 rings so now what? dont think i will ever buy another jc .