john deere walkbehind wont start 12.5 hp engine

Discussion in 'Mechanic and Repair' started by greenman1676, Apr 7, 2008.

  1. greenman1676

    greenman1676 LawnSite Member
    Posts: 11

    i have a john Deere walk behind 12.5 hp Kawasaki high torque engine. i cannot get any spark. new plug, ignition coil was replaced last spring,new igniter.im am stumped on yhe whole thing.i lightly sanded the ignition coil [little rust].what happend was i replace the drive belt.started the mower, engaged the pto. it stuggled with the pto i went to turn the gas up and it died [no spark ever since]. any information would be great guys. :) thanks
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    Sounds like you have a bad pto or operator's presence switch, If you disconnect the harness kill wire (most are black) from the igniter and it now has spark this will show a switch problem.
     
  3. greenman1676

    greenman1676 LawnSite Member
    Posts: 11

    i think the pto is fine. are you talking about the 2 wires going in to the igniter.i have 2 white wires going in to the igniter. they both go to one connecter into the igniter.
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    Instead of guessing post the Deere model/serial number so I can look up the wire diagram. There has got to be a kill wire going from the igniter to the key switch.
     
  5. greenman1676

    greenman1676 LawnSite Member
    Posts: 11

    john deere commercial walk behind mower fc400v-as05 john deere Kawasaki 12.5 hp high torque engine.gx1450x050073 e/no fc400v009175
     
  6. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,022

    OK, Here's the wire to disconnect;


    [​IMG]
     
  7. Goody

    Goody LawnSite Member
    Posts: 4

    Greenman1676,
    Hi,
    I have the same problem with my Kawasaki, did you finally get spark? I have done everything I can think of and still no spark. Any suggestions would be appreciated....
    Thanks
    Goody
     
  8. StevieZ

    StevieZ LawnSite Member
    Posts: 104

    Deere had a service bulletin on some of the wiring harnesses. The wies were too small for the current. I had one go bad and fried some other wires. I bought the repair kit and the problem was solved.
     

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