hey polybus .. sometimes they come unclipped from the coil too . then no matter what you try it wont shut down . sometimes you can see if you look under the cylinder head deep in the bowels in there if its not full of grass clippings , might have fallen off in there they do but not often .
under the head in between the tin plate and bottom of engine , tip it on its side , blow out thr rubbish and with a torch have a good look , might be our problem hiding in there
hope it works and good luck mate
, Dave
