Reply To: 1948 Johnson TD-20

Home › Forum › Ask A Member › 1948 Johnson TD-20 › Reply To: 1948 Johnson TD-20

January 3, 2026 at 3:54 pm #302957
JACQUES
Participant

    see article on condensers  any .22uf  used on 1950s+ magnetos pretty well fits

    see  excellent  downloadable articles from MR Mohat ………. part 1-4  on condensers   testing  sizing  repairs ..

    The REPAIR article shows you how to reuse the “cans” and  pop in a condenser for easy mounting 🙂

     

    Magazine Articles | Western Reserve Chapter

    Motors 1930s and 1940s, (Alnico Magnets, 2 pole / 3 pole construction, smaller size spark
    coils)….use a .22 to .47uF condenser.
    Motors 1950s and newer (all)….just use a .22uF. It REALLY isn’t at all critical, apparently!
    Also note that almost all 12V “Battery and Points” ignition systems seem to use something close
    to 0.22uF as well, so this is sort of your ‘universal replacement’ value.

     

    Joining AOMCI has priviledges 🙂