I had the carbs cleaned. I then filled it up with gas brought it home then started it up ran great then I let it sit for about 20 min went back to start it and pulled the cord and could not I then pulled the plugs and then pulled the recoil cord and gas shot from the cylinder about 10 to 15 feet in the air from both cylinders. This again is a pz480 1986 yamaha phazer.