Re: 1940 Johnson HD-15 Magneto testing

[joesnuffy]

I went and read another thread where you had posted this info:

-Coil Secondary 6.29 K ohms
Primary .8 K
-Kill Post working as designed
-Flywheel magnets – "So-so to Iffy"
-Flywheel brass grounding contact to "ground", "0 to .7" ohms resistance.
-The carbon brushes have good continuity to the coil,
and not grounded out anywhere.
-New plug wires with good readings at terminals.

6.29K ohms on the secondary which that is how I would test motor. Hook up multimeter to secondaries. Use the snaked wire to go to points connection using either a buzz box or multimeter slowly turn flywheel in the direction motor runs. Secondaries continuity should break before the points break. The secondary continuity also has to stay broken until points break. If all that checks out then bakelite is in the right position.

Hope that makes sense,

Joe

ps I also read where mumbles fixed a crack in one of his brush holders with clear fingernail polish. If motor still doesn’t run right you might consider coating the entire outside of both brush holders with clear fingernail polish that might help prevent arching if its happening.

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