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  1. #1
    Join Date
    Feb 2013
    Posts
    3

    Default miller bobcat 225nt blows f1 fuse?

    Hello, new to the forum. I have a miller bobcat 225nt with an onan engine. I have replaced the d4 diode and the f1 fuse. For some reason it keeps blowing the fuse. I have checked the r2 rectifier, also checked the new d 4 diode. Checked the capacitor and brush rings also.

  2. #2
    Join Date
    Feb 2013
    Posts
    3

    Default

    Also meant to add....my idle control board popped, will that cause the f1 fuse to keep blowing?

  3. #3
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,742

    Default

    Disconnect "E" from the idle board, replace the fuse, and see if it pops again.

    It may be a failed SR2, bridge, or failed exciter coil. Tough to call.

  4. #4
    Join Date
    Feb 2013
    Posts
    3

    Default

    Quote Originally Posted by cruizer View Post
    Disconnect "E" from the idle board, replace the fuse, and see if it pops again.

    It may be a failed SR2, bridge, or failed exciter coil. Tough to call.
    pulled the e terminal off....still blew the fuse

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,742

    Default

    Well, that means a failed SR2 (unlikely but possible), or a failed shorted exciter coil. very likely and big bucks to repair.

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