Ty, Briggs moved to an all-in-one ignition unit (Magnetron) in 1982 and haven't used points since. The unit replaced the coil - it was a coil with a little electromagnetic sensor attached to it, to trigger the ignition as the flywheel magnet passed by, so no points were required. It can be fitted to older engines without modification of the engine. I'm not familiar with the appearance of the later electronic units - the original Magnetron was electrically rather crude, though they seem to have been reliable. sparker's unit looks just like the early coils, but doesn't seem to have the external Magnetron sensor attached.
Post edit: the ignition unit in the picture is a Magnetron, and the electronic unit is the black part which Mr. Davis has circled.
Perhaps they made the device more compact. Anyway, all of them look the same: same coil, attaching to the engine in the same place, and in the same way. The only change was in how the coil primary was triggered.
Last edited by grumpy; 06/03/13 02:10 AM. Reason: Post edit to correct original text
