Electrical help needed on Kawasaki 14hp FC420v

Discussion in 'Mechanic and Repair' started by C4chris70, Mar 16, 2010.

  1. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,696

    I can't tell much by looking at the Scag harnesses. They have a whole bunch of them for Scag 14 HP belt drive, electric clutch, manual start mowers. Judging from the few I looked at it's really pretty hard to screw it up but I'm sure it could be done. On a side note... Scag has an adapter to use a Kawasaki engine on a Kohler wiring harness but it's too late for that now.

    I would start with replacing the stator. What else can you do?
     
  2. rotti1968

    rotti1968 LawnSite Member
    Messages: 169

    Kawasaki min for the stator on that motor is 30v ac if anything less the stator needs to be replaced on the 13 amp style.
    the 3 amp stator min spec is 27 v
    what is the exact mod# and spec of that engine ?
     
  3. OP
    OP
    C4chris70

    C4chris70 LawnSite Senior Member
    Messages: 501

    I'll give that a shot. I'm going to order a new regulator as well to be on the safe side. Thanks for your help! I will keep you posted.
     
  4. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,378

    you will need to order part # 12 403 01 kohler rectifier . this is not a regulater, as regulaters are only used with battery ignitions (key start ) Rectier must be attatched to engine block or clean sheet metal to insure a good ground.if its not grounded it wont work . use 1 of the holes in rectifier.
     
  5. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,696

    What's the purpose of the recifier? Is it compatable with the Kawasaki engine?
     
  6. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,378

    the rectifier simply converts ac voltage to dc . the regulater also converts voltage , but it also senses and regulates output to system
     
  7. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,696

    Yeah but the rectifier in a Kawi is built into the regulator. That's why I was wondering why he also needs a Kohler rectifier? He took a Kohler off and put a Kawi in it's place.
     
  8. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,378

    to make this engine swap work properly, you use the kawasaki stater and the kohler rectifier. there can be no regulater on an engine that does not have a battery. the only thing operated off the stater is the clutch. The kawasaki regulater is looking for a load , in this case the battery,to tell it when to shut down. with no load it pumps max volts into harness , cooking wires, this setup works , I done this setup many times.
     
  9. rotti1968

    rotti1968 LawnSite Member
    Messages: 169

    Im with you on this also, why not just get the correct kawasaki part and hes only getting 5 volts out of his stator so he needs to replace that first , this may have the correct spec for a none battery unit . The stator may have been bad from the start and could be the cause to all of his issues.
     
  10. rotti1968

    rotti1968 LawnSite Member
    Messages: 169

    If your look at this spec sheet for this engine the s09 and s14 spec are made for a unit without battery and includes a clutch. It has a condenser to control the power needed for the clutch. Im sure that if he tells his kawasaki dealer the issue he is having and that he is in need of a new stator they can set him up with the correct a:stator,b:the correct regulator and c: the condensor.
    The spec sheet is direct from the kawasaki dealers web site this is the most current info on that engine.
    voltage regulator part #21066-2071
    stator part#59031-2003
    condenser part#21013-2064
    may need wiring harness part#26001-2150
    hope this helps some
     

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