It may be a mute point now, but FYI, on a Briggs engine magneto I found the stiff wire that is used to go to the engine kill switch, low tension, it is very brittle with age. I cracked it right to the point within the epoxy where it comes out of the magneto.
My fix was to use a crummy old tip on a solder pencil to melt/burn away some epoxy, just enough to get a way of soldering high voltage flexible wire. I scraped the wire I exposed with an exacto knife to get clean of burnt epoxy. After I used a good tinned solder tip and soldered more wire, I used high temp red RTV and that became a massive strain relief when potted over a few inches of the wire and the magneto. Motor runs and trying to get another magneto for the engine that is out of support life, not a problem.
BTW the yellow wire going to the points under the flywheel also broke after I already use sealant on the points cover. I just used some heat shrink over the soldered extension wire to fix. This wire directly connects to the other previously way more brittle low tension wire. I soldered them together outside of the point cover and heat shrinked them as well. Then this is my low tension kill switch wire.
Measure Twice