I just took the jug off and found the piston in backwards ( arrow at intake)AND THE TOP RING UPSIDE DOWN. Im finding more and more wrong with this thing. Put it all back together and now shes smoking like a broken stove. Could it just be a build up of oil from the piston being backwards or something worse. There were a few scores in the cylinder but didnt look major. Heck theres oil blowing everywhere, its pouring out the manifold and even the pipe at the rear. It revs good but i had to shut it down before the neighbors called the fire dept.:-/:-/:-/:-/