FD661D "dieseling"

Discussion in 'Mechanic and Repair' started by EMJ, May 30, 2007.

  1. EMJ

    EMJ LawnSite Member
    Posts: 200

    I have a kawi FD661d that I have cleaned the carb and adjusted the valves and now when I shut it off it "diesels". Does any one have an idea what I have done to cause this?
     
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Did you set the valves at TDC to .010" ? Could be idling a little high now since you cleaned the carb out.
     
  3. EMJ

    EMJ LawnSite Member
    Posts: 200

    Yes I used tdc to adjust the valves. It could be a high idle but it does not sound like it. I also think that the top end has lost some rpms. I guess I need to get a tach and see what they are. Anyone know where or who makes a good hand held tach.
     
  4. ArchZangel

    ArchZangel LawnSite Member
    from Florida
    Posts: 24

    and Stihl make good hand-held tach. Pricy but worth the money. Also over heating contrubutes to dieseling. Check your cooliong system.
     
  5. EMJ

    EMJ LawnSite Member
    Posts: 200

    Temp guage is reading normal. Everything else seems ok. It only started after the carb job???????
     
  6. Bill Kapaun

    Bill Kapaun LawnSite Senior Member
    Posts: 915

    Does this carb have a fuel shutoff solenoid that was improperly installed/modified?
     
  7. EMJ

    EMJ LawnSite Member
    Posts: 200

    Yes the carb has a fuel shut off solenoid, it was remove and then reinstalled. It just screws into the carb. I do not thimk that I mess that up, but it is possible. Is there a special way to install the solenoid???
     
  8. Bill Kapaun

    Bill Kapaun LawnSite Senior Member
    Posts: 915

    I don't know about a "special way", but-
    An engine requires fuel to run on.
    The solenoid is supposed to shut off the fuel supply to the Main Jet.

    Are you shutting the engine off at higher speed so the excess fuel vapors are getting "purged".
     
  9. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

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