I got a briggs block free from a guy and put a carb on it and put some mystery oil on the piston and the valves aliened the timing and cleaned the gas tank with all new carb gaskets 3(engine and carb, carb and gas tank, side of carb) I tried to start it and after five minutes of it starting and then dieing it finally started and ran at around 2700 rpms (a rough guess) and then it slowly died and just gave me a small back fire and quit now all as i get is a pop/backfire when i pull it? :censure: