John Deere Gator carb spitting

Discussion in 'Mechanic and Repair' started by pdege, Sep 9, 2006.

  1. pdege

    pdege LawnSite Member
    Posts: 10

    Bought a used 4x6 gas 3 years ago. Performance was slowly going down hill. Spark plug (only 1 of the 2 cyl)was carboning up. Occassional backfire. Now it is spitting out of the carb. Bought a new carb since Bubba had bent the mix needle and I assumed that was the carbon cause. Also bought a new muffler. Still spitting out of the carb. Compression 180# rear cyl, 193# front cyl. I am now at a total loss as to how to get this thing running.....help

    Thanks, Pat
     
  2. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Posts: 1,164

    Need some engine #'s:confused: and have you tried a valve adjustment? Make sure you are running the correct spark plug John Deere has had a few changes to the plug they use, the last I can remember were NGK BM2A I would have to do some more searching but I will need the engine info.
     
  3. pugs

    pugs LawnSite Gold Member
    Posts: 3,022

    Try doing a leakdown test and see what you have.
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    I believe MM is onto something with the valve adjustment, Thats what it sounds like to me also.
     
  5. pdege

    pdege LawnSite Member
    Posts: 10

    I'm using BRM2A-10. Engine #FD620D-BS11 and FD620D093865

    Valves are at a loose .010

    Don't have a leakdown rig.
     
  6. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    may be an intake valve problem. does it even run at all now?
     
  7. pdege

    pdege LawnSite Member
    Posts: 10

    No it has stopped running. Wouldn't an intake problem show in a compression check?
     
  8. khouse

    khouse LawnSite Bronze Member
    Posts: 1,465

    then maybe your flywheel key has sheared? does it spit and pop out the carb?
    what kind of engine do you have in it?
     
  9. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Posts: 1,164

    Plug # you gave is good and so is the valve clearance, How are you testing for spark?
     

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