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toro/exmark z wont start except by jumping solenoid

Discussion in 'Mechanic and Repair' started by 44toroz, Apr 20, 2009.

  1. 44toroz

    44toroz LawnSite Member
    Posts: 24

    Finally got around to fixing up my old toro z master model 74171(20 horse kohler 1999 model) It sat for almost 2 years. I can only get the unit to turn over by jumping the solenoid with no spark or by disconnecting the engine harness right by the engine with spark but no fuel.( no power is then going to the fuel shut off solenoid so it wont fire) So it is pretty obvious it is a safety lockout issue. Ive tested the seat plunger, the parking brake plunger, the ignition itself, and the pto switch. The only 2 things I know of that is left is the motion control plungers which are mounted in the most difficult place to get to on the whole mower, and the control head or module which I don't know how to test. Ive also checked the 2 20 amp fuses under the seat. I'm wondering if anyone out there has any suggestions or recommendations on how to troubleshoot this thing.

    Thanks a lot
  2. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    Bad solonoid? Just cause you can jump across it doesn make it could. Also could have a bad key switch. Not likely the timedelay module, it will normally start with that being bad, it will just die when you release the brake.
  3. topsites

    topsites LawnSite Fanatic
    Posts: 21,653

    I've always figured if the solenoid needs jumping then replace one bad solenoid.
  4. 44toroz

    44toroz LawnSite Member
    Posts: 24

    Is there a way to test the solenoid? thanks guys
  5. jlink

    jlink LawnSite Member
    Posts: 29

    I had the same problem a couple years ago. I jump started mine at the solenoid with a screw driver for a whole mowing season since it wasn't much of a problem to start that way. My problem ended up being a faulty ignition switch plug. Its the plugin on the wiring harness that plugs into the back of the ignition switch. Corrosion had eaten it up internally.
  6. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    you got a multi meter?
  7. 44toroz

    44toroz LawnSite Member
    Posts: 24

    I do Have a meter and i have got to get this thing running this weekend. Any help would be greatly appreciated.
  8. betmr

    betmr LawnSite Bronze Member
    Posts: 1,663

    Well did you check all the wireing conections to be sure they are good ? If so, a new soleniod would be my first try, they're cheap enough.
  9. 44toroz

    44toroz LawnSite Member
    Posts: 24

    I have replaced pto switch and ignition switch. I tested seat switch, and parking brake switch. Dont know how to access the 2 motion control switches or how to test the solenoid or the safety module. Im ready to give this thing to the shop and pay those s.o.b.s to fix it. Please somebody help me before i go insane. thanks
  10. 44toroz

    44toroz LawnSite Member
    Posts: 24

    thanks for all the help. to the shop it goes.

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