Calling coil experts….!

Home Forum Ask A Member Calling coil experts….!

Viewing 8 posts - 1 through 8 (of 8 total)

  • crosbyman

    Canada Member - 2 Years
    Replies: 3588
    Topics: 326
    #251682

    with the apparent failure of some Chinese coils what could be wrong with the coils ??? they seem to test good ohm wise (static test) but fail under load

    less tolerant yet blamed for weaken flywheel magnets ?

    less senstive metallurgy of the laminates (cheap steel less conductive to magnetism ? )

    cheap-corrupted copper alloy in the windings causing less current flow when the magnetized cores collapse when points open up ?

    Mr. Mohat ???

    Joining AOMCI has priviledges 🙂

    • This topic was modified 2 years, 3 months ago by crosbyman.

    joecb

    US Member - 2 Years
    Replies: 906
    Topics: 92
    #251705

    Could be any of the above mentioned or likely a combination, and additionally poor varnish insulation on the windings.

    Joe B


    opposedtwin

    US Member - 2 Years
    Replies: 968
    Topics: 259
    #251736

    I was under the impression that the coils were good but the laminates were lacking? I have removed the laminates from some old, cracked coils with plans to use them with the chinese coils once I run out of the good German ones. Altgough I have not yet bought any chinese coils, I assume eventually they will be our only option
    Scott


    crosbyman

    Canada Member - 2 Years
    Replies: 3588
    Topics: 326
    #251741

    this week I chucked and older but not cracked one … the HV pin was flopping from infinity to 7 kohms .. as I probed the pin….

    so far that is probably the worst I have seen on non-cracked coils.

    can’t say I had much bad luck with them

    Joining AOMCI has priviledges 🙂


    outboardnut

    US Member - 1 Year (includes $3 online payment fee)
    Replies: 930
    Topics: 419
    #251750

    opposedtwin -I believe the Sierra coils are the ones with bad heels


    duprebrad


    Replies: 8
    Topics: 1
    #251974

    I am needing a prop shaft seal for a 1957 Elgin 7.5 HP. It is 3/4 inch OD and 1/2 inch ID. About 1/4 inch thick. It looks like multiple manufacturers used the same seal around that time.
    It is held in place by a 1 inch pressed in washer./Users/braddupre/Desktop/IMG_1347 2.jpegIMG_
    See photo below.

    • This reply was modified 2 years, 2 months ago by duprebrad.

    duprebrad


    Replies: 8
    Topics: 1
    #251975

    [


    crosbyman

    Canada Member - 2 Years
    Replies: 3588
    Topics: 326
    #251979

    duprebrad…. this topic is for coils you should open a separate topic on seals….

    but just fyi here is a list of seal size and numbers

    Joining AOMCI has priviledges 🙂

    • This reply was modified 2 years, 2 months ago by crosbyman.
Viewing 8 posts - 1 through 8 (of 8 total)
  • You must be logged in to reply to this topic.