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  • Mag and plug question

    Hello all, Trying to solve a few issues on N43319, '46 BC12D, A-75.

    Had a few Stromberg problems that are dealt with, and now my left mag is dropping off. SFRN-8 on the left, running REM40E's on the bottom plugs. Running old C26 plugs on top. She runs just grand on the right mag and the old C26 plugs.

    I have lots of extra bits lying around, so in the interest of economics I've been going through my options. Most of my 40E plugs are testing beyond spec on resistance. The wires on the left mag aren't all that great either, condition-wise.


    That being said I have a couple of SF4RN-8 mags off of an A-65 that I was gonna have serviced. They each have nice low-time prestolite wires with the proper ends for C26 plugs. I happen to have a few extra C26 plugs lying about as well. So, can anyone think of a reason not to change the 40E plugs and their wires out and install the original-style and the C26 plugs? Since I have the parts and it doesn't take much effort I was thinkin' from an analysis standpoint it makes since before pulling the mag and opening it up.

    As far as comm goes I have an antenna up top of the port wing root with a good ground plane, plumbed down to my old King KX99 handheld. The unshielded plugs on top haven't been causing me any grief on the occasions I've needed a radio, so going that route on the left mag won't likely be a concern either...mebbe.

    Any input would be appreciated...
    Stumpy
    N43319
    BC12D

  • #2
    Re: Mag and plug question

    I have a plane that is unshielded on the ignition. I only get the buzz on the open frequency, not with the reception. As far as transmit, nobody has complained about it. I don't think I'd worry about it, if you got the stuff give it a shot. Those old plugs seem to run forever and I've had a bunch of OTB failures on these new plugs.
    EO

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    • #3
      Re: Mag and plug question

      My plane had unshielded ignition and it drove me absolutely crazy with the popping. Only time it stopped was during transmission. If it won't cost you anything but time, try it and see what yours does.
      Cheers,
      Marty


      TF #596
      1946 BC-12D N95258
      Former owner of:
      1946 BC-12D/N95275
      1943 L-2B/N3113S

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      • #4
        Re: Mag and plug question

        i destroyed my hearing in about 1964-65 flying my BC12D to south Florida and back with unshielded mags and listening to the old Superhomer VOR freq for navigation and old style headphones. The tuning drifted on those old radios and you had to monitor to stay on frequency. If you don't use radio much or any, probably no trouble not having shielded system. I doubt that it would interfere with GPS.
        Larry Wheelock

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        • #5
          Re: Mag and plug question

          Got to love them Superhomers state of art back them.
          Dennis Keels Foundation #400

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