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anyone using a Kubota W5021 walk behind mower?

Discussion in 'Lawn Mowing' started by _CY_, Mar 27, 2009.

  1. treysoucie

    treysoucie LawnSite Member
    from houston
    Posts: 126

    Try my later link
    Posted via Mobile Device
     
  2. treysoucie

    treysoucie LawnSite Member
    from houston
    Posts: 126

  3. fumblefingers

    fumblefingers LawnSite Member
    Posts: 55

    They both work Got the service manual. What is not listed in SM is the adjustment screws on the carb. I see the choke is set 2mm back from the edge on the govenor.

    As I mentioned the carb was in really bad condition. I did not remove the nozzle that the main jet screws into so maybe I should try doing that but right now I think that the adjustment screws may be foo bar. Possibly the owners manual (which i don't have) identifies which screw is which and how to adjust. Do you have any idea's?
     
  4. fumblefingers

    fumblefingers LawnSite Member
    Posts: 55

  5. fumblefingers

    fumblefingers LawnSite Member
    Posts: 55

    pulled carb again today and had mower repair shop look at it. Since it is flooding, they say only float will cause this. The float shows no leakage and vacuum gauge shows closing against vacuum so they suggested, since the needle is steel and the seat is not changable, that I use q tip in drill and toothpaste on tip and try to polish the seat to remove varnish build up. At this point I will give it a try. The carb does NOT have a high speed adjustment but does have a low speed adjustment and a idle adjustment. They suggest that the low speed adjustent be started at 2 full turns then turned down in 1/8 increments when running.
     
  6. treysoucie

    treysoucie LawnSite Member
    from houston
    Posts: 126

    Keep me posted. I am out of town until Friday. When I get back I'll take some pics of the linkages
    Posted via Mobile Device
     
  7. fumblefingers

    fumblefingers LawnSite Member
    Posts: 55

    The butterfly on this carb has a very weak spring and I noticed that the butterfly would snap closed when observed from the side as gravety helped pull the flap closed but when in the mounted position the butterfly did not move to closed. This was missed in the cleaning and the varnish could be heard with a squeek when manually working the flap. After another soaking in carb cleaner and manual manipulation at least 100 times the flap was better but not perfect. I guess 21 years of abuse has taken it's toll and varnish will come off in layers. It is easy to see why some give up and buy a new carb :dizzy:
     
  8. treysoucie

    treysoucie LawnSite Member
    from houston
    Posts: 126

    the best way to clean a carb is the old pine sol trick... soak the disassembled carb in pine sol over night... even better if you place a fish tank air stone in to agitate it... it will eat all varnish. google "pine sol carburetor"
     
  9. fumblefingers

    fumblefingers LawnSite Member
    Posts: 55

    Thanks for the tip.
     
  10. fumblefingers

    fumblefingers LawnSite Member
    Posts: 55

    I got the butterfly to operate as it should then put the carb on and set the choke to specs. Engine started on first pull in choke and ran for a minute but when I put lever in run engine would run with surging fast then slow. When back in choke engine running without surge I did not try to remove the nozzle but that is the only thing that I can try to do now. I see on the Sears parts list that the nozzle is repaceable. Does it press out or screw out. I see nothing in the SM about this.
     

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