The brush holders must be Bakelite or something similar as they are hard and one has a piece broken off it. I didn’t want to be too rough with them as they seem fragile. While picking away at the carbon track I could get a feel for the material.
The guy I bought the motor from didn’t tell me it had no spark on one cylinder. ‘It ran good the last time I used it’ scenario. This is my first motor with this style of magneto so figuring out how it worked took a bit of thinking to. It’s actually quite simple once you understand it. Troubleshooting this mag drove me nuts as everything on the mag plate checked out but I couldn’t see the leak on the brush holder. Clear nail polish seems to have fixed that but then there was the burned out ground spring in the flywheel causing issues to so this mag actually had two major problems. A small spring from a Merc float solved the flywheel ground issue.
