Hi Grumpy I feel a bit stink calling you that considering your being so helpful.
OK now i'm getting the hang of the the names.
the magneto exposed metal parts are about the thickness of a business card or less away from the flywheel but there is no adjustment so the gap is set(old mower)yes the grounding wire is under one of the screws and i put that back as it was.
now I know what the kill wire is its on the other side of the engine i haven't touched that yet as i didn't know what it was. On this mower it has the on/off knob on the engine cover and the on/off knob has a dual purpose as it is also the primer for the petrol. So if I'm guessing this right the other wire on the magneto that disappears under the flywheel must go to the on/off knob. and it is screwed to the frame, I just had a look with the on/off knob in place(it is a long piece of hard blue plastic 115mm long with a spring on the outside and a flat piece of metal at the base)when this is in the off position the metal at the base touches the kill wire screw. the kill wire on each end looks ok but for me to see the rest of the wire i'm going to have to take off the flywheel.
I wish i could take a picture and add to my post but don't know if you can do that.
Thanks for your continuing help
Pete
