sounds like the ignition coil is rusted you need to take off the pull cord housing you will see the spark plug lead attached to the coil detach two bolts holding it down check the gap first so when you reset it you will get it right lift the coil away from the magnetic drum if it is rusted or has any deposits clean off with wire brush the drum and coil faces when its clean put a small amount of light oil onto the faces of the magnetic drum and the faces of the coil reset the gap leaving the feeler gauge between the face of the coil and magnetic drum tighten the two bolts when you have them tightened spin the drum by hand one complete turn check the gap again if it has remained correct refasten the pull cord housing if that doesn't work clean out the carburattore
alex
June 2010