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Need info on SW Tachometer

Discussion in 'The Hokey Ass Message Board' started by Ralph Moore, Jun 18, 2013.

  1. Ralph Moore
    Joined: May 1, 2007
    Posts: 651

    Ralph Moore
    Member

    I have a Stewart Warner tach with 765JG4 and insp 1951 stamps on the back.
    I want to use it in my coupe, but I am unsure how to hook it up. It has two terminals on back, both unmarked, and being from 1951 I'm assuming it's 6 volt.
    How would I hook this up to a 12 volt system? Use a voltage reducer?
     
  2. Ralph Moore
    Joined: May 1, 2007
    Posts: 651

    Ralph Moore
    Member

    Anyone delt with this before?
     
  3. Andy
    Joined: Nov 17, 2002
    Posts: 4,803

    Andy
    Member

    Pics would help. You may have a tach that used a signal generator.
     
  4. Ralph Moore
    Joined: May 1, 2007
    Posts: 651

    Ralph Moore
    Member

    I'll try to load a picture, for some reason it won't work from my I phone.
     

  5. It needs a sender.
     
  6. Canuck
    Joined: Jan 4, 2002
    Posts: 1,092

    Canuck
    Member

    Sender is required, do not hook up without one.

    For 12V senders, check Stude Hawks in early 60s.

    [​IMG]

    This one is going into my 30 coupe.

    Canuck
     
  7. Ralph Moore
    Joined: May 1, 2007
    Posts: 651

    Ralph Moore
    Member

    Where does this sender hook up to, the coil? And is there a pos/neg to the terminals?
    Does anyone deal with these senders new or aftermarket? I'm on a different computer, here are pics.
     

    Attached Files:

  8. wagoon78
    Joined: Nov 13, 2008
    Posts: 360

    wagoon78
    ALLIANCE MEMBER

    Hopefully these photos work. Wiring mine up this week and this is what i found.
     

    Attached Files:

  9. alchemy
    Joined: Sep 27, 2002
    Posts: 17,460

    alchemy
    ALLIANCE MEMBER

    Ralph, that's not a 1951 tach. Check the next date for that code.
     
  10. Ralph Moore
    Joined: May 1, 2007
    Posts: 651

    Ralph Moore
    Member

    Thanks that diagram helps alot, I was going by the stamp, SW INSP 1951 as far as the date. Does the part no cross to a certain year?
     
  11. Canuck
    Joined: Jan 4, 2002
    Posts: 1,092

    Canuck
    Member

    The sender and wiring diagram poster by Wagoon are for a different model tach.

    The sender for a 765 is a rectangular metal box with the wires coming out of a bedding compound in the bottom. One connection on the side of the box to select 6/8 cyl. Sorry don't have a picture on computer, if I find one will post it.

    Search e-bay and Stude sites using the model number.

    The correct wiring diagram is:
     

    Attached Files:

  12. Canuck
    Joined: Jan 4, 2002
    Posts: 1,092

    Canuck
    Member

    Last edited: Jun 25, 2013
  13. alchemy
    Joined: Sep 27, 2002
    Posts: 17,460

    alchemy
    ALLIANCE MEMBER

    The G4 on the end of the paint stamp is the date code. Means April 1963 or 1987 (I'd say the 1963).

    See the chart that I gave Dave Mann here: http://www.roadsters.com/sw/
     
  14. Ralph Moore
    Joined: May 1, 2007
    Posts: 651

    Ralph Moore
    Member

    Yea, I would go with the 63 as well. Good, now I just have to find the box.
     
  15. Ralph Moore
    Joined: May 1, 2007
    Posts: 651

    Ralph Moore
    Member

    Talked to a Studebaker guy here and he referred to Studebaker International, their catalog shows a repop rectangular sender for 62-64 hawks
    Pn 800009. Anyone tried one of these? I wrote them, but they could not cross-reference the SW part number on the tach.
    Sorry Canuck, I just looked at your post again and saw that you posted the link for them earlier. It looks like they have the part I need.
     
    Last edited: Jul 17, 2013

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