Gas getting into Oil

Discussion in 'Mechanic and Repair' started by mowZ06, Mar 12, 2012.

  1. mowZ06

    mowZ06 LawnSite Member
    from Ohio
    Messages: 248

    Gas is still getting into the oil in my 12.5 Kawasaki FB460 after I installed a new needle valve in the carb. Besides the carb is there anything else that would cause this.

    CLARK LAWN LawnSite Silver Member
    Messages: 2,526

    Choke sticking? Something is making it dump to much fuel into the cylinder. You might want to just replace the entire carb. After you do that make sure you change the oil and spark plug.
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  3. Runner

    Runner LawnSite Fanatic
    Messages: 13,497

    Do a compression test, also. Possible bad rings.
  4. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,316

    Clogged bowl vent.
    gas cap not venting.
    new fuel needle not seating.
    Bad or sticking float.
    bowl gasket not properly installed.

    Ought to keep you busy for a few minutes.......
  5. cutyourgrass

    cutyourgrass LawnSite Member
    Messages: 107

    Pull your carb off.
    Reattache your fuel line.
    Open the fuel line shut off.
    If fuel starts running out of the carb your float is staying open.

    If you have a fuel solenoid it may be stuck open. Remove it from the bottom of the fuel bowl (1/2" wrench). Run a jumper wire from the hot side and the other to ground. If it doesn't pull in, it is bad.

    I have had this and soaked them in brake cleaner. Dug around with a strand of wire. Blew it out with air and all was well. Just be careful, don't let the brake cleaner stay on any seals for too long. It can and will eat them up.

    That is usually what I find wrong with the ones at work. 9 times out of 10 the fuel shutoff was left open and gravity took over.
  6. mowZ06

    mowZ06 LawnSite Member
    from Ohio
    Messages: 248

    Thanks for all the info guys. See what I can do here.

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