ORIGINAL: tony0707

hi if you are looking at the brass in the lineryou have worn through the chromeit is time for a new piston and liner- once that starts it is a self distruction modethe liner will sand paper itself to death in a short timedo not put this engine on a pipe until you replace the liner the problem is you can buy a new engine for the cost of a piston and liner parts would be hard to find for that engine -i would return the engine to the person who sold it to you if you still canas you bought a very used up enginei have done this many times when i paid with paypal as they stand behind the sale-you can even ask the seller to pay return shipping if he misrepresented the itemGOOD LUCKENJOY REGARDS TONY