ive found info somewhere to make a spark tester, use a piece of timber with 2 nails in it bend the nails over so the ends are a couple mm apart,
attach wire to each nail with alligator clips on the ends, attach one end to the coil lead and the other to good earth point [somewhere on the head of mower is good] and pull the cord it is good to leave the nails so that they can be turned to be either closer together or further apart then by moving them you can find out just how good the spark is and how far it will jump. best to do this test in a dark place or at night
ive lost my one but ill make another this coming weekend and start a new topic about it and take some photos of the building process.
