I rode it a couple of miles yesterday .
What caused that ?
Well , I ordered a Cushman ignition coil from Carpenter , in the morning . An hour later I tore my OEM coil apart to see what was what and how it was constructed .
FYI : I had destroyed that coil about 10 years ago with cleaning chemicals and could never get a spark out of it again .
Anyway , after removing 97% of the exterior protective coating , what ever that was , I noticed a very fine wire . My hair is likely thicker . That wire wasn't attached to anything . It had to go somewhere and I figured it had to connect to ground as the other end of the coil connected to the high tension 'ring' ( normally exposed outside the exterior insulation ) .
I dug my multimeter out and set it to 20K ? . One lead to the ring and one to the wire . I got a reading of 14.11K? .
That was too good . I pulled the flywheel and then the marine coil I had mounted . Then I replaced the marine coil with the stripped OEM coil , making sure the loose wire was well grounded . Installed the flywheel ; kicked the motor over and wonders of wonders , it started and ran for a minute . After a bit of tweaking the carb adjustments , the bike wanted to take off . I had to back the idle down and then it kind of purred . Purred good enough I dared take it for a short ride as a test . A bit more tweaking and I took it for a longer test ride . It even climbed a fair hill , albeit slowly .
I'm wondering what the Carpenter coil Ohms out at . The marine coils I have measure only about 4K? .
Ernie told me , this past weekend , that he had a coil that measured about 6K? and it did about what my bike was doing . He then tried a coil that measure about 9K? , which had the bike running much better .
I drew from that^ talk that any coil 9K? or above should be fine .
The OEM coil measuring 14K? is not surprising as it needed enough 'push' to fire 2 plugs .
Ad so , I think I'm headed in the right direction to get my '57 on the road , running reliably , under it's own power .
Pete .