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  1. #1
    Member
    Join Date
    Jun 2007
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    35
    Location
    Ona, WV
    Tractor
    PT425

    Default 2 part gas to 1 part oil = unhappy 425 owner

    Returned from several months absence to my 425 with 36 hrs on. Tried to start 'er up ... no joy. Called Tazwell. Checked my oil level at their suggestion. It was way too high. I had about a gallon of gas diluting the oil. Anyone know why this happened? I've dealt with a lot of engines over the years but never had that happen before. Probably even more important, anyone know how to prevent a repeat of that from happening again? I thought cut off valve but that fuel line is really small diameter stuff!

  2. #2
    Epic Contributor MossRoad's Avatar
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    Aug 2001
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    29,802
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    Haven't we heard something about this before on someone else's PT 425?

    Good grief. I feel sorry for anyone with this kind of problem. Gas running through the carb and flooding into the engine then down into the crank just smacks of poor design or faulty components like a fuel shut off solenoid.

    I would definitely get a shut off valve for this thing. What if the fuel would have overflowed the engine and gone onto your floor and who knows where? Very dangerous.

    Is your tank plastic or metal? If it is plastic, you can put a piece of electrical tape on the side of the tank at the fuel level and then monitor it overnight to see just how much it is leaking over a given time. That can also help you determine if it was a one time stuck open solenoid or if it is still happening.
    MossRoad

    Click On My Little Tractor
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  3. #3
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    834
    Location
    Seattle, WA
    Tractor
    Power Trac 422 (2005)

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    The easiest way to prevent it in the future is a manual shutoff valve on the bottom of the gas tank.

    Soemone else just had this problem in the last couple of months:

    http://www.tractorbynet.com/forums/p...er-issues.html

    Your problem is a stuck open float valve (and the lack of a solenoid shutoff that actually shuts off ALL paths for fuel to flow into the engine).
    -----------------------------------------------------
    Tim
    2005 PT-422
    4n1, LMB, minihoe, 48" mower, brush hog, Land Pride aerator, Herd spreader, auger, towing, forks, box blade, plow, box blade, tiller, trencher
    PT422 (6/23/05) photo page

  4. #4
    Super Star Member J_J's Avatar
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    Sep 2003
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    18,922
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    I had a Honda powered air compressor that did the same thing. It is not related to just one brand either, all engines with out the fuel shut off solenoid may leak. The needle valve that the float pushes on is the problem. I found mine when I went to start, and it went into hydraulic lock, which means that the crankcase is full, and the piston can not move down. I now double check the fuel shut off.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  5. #5
    Member
    Join Date
    Jun 2007
    Posts
    35
    Location
    Ona, WV
    Tractor
    PT425

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    MossRoad is right about the situation being dangerous. Trying to start did result in a gasoline saturated air filter with excess fuel running down the sides of the Robin. If I'd had a backfire .... well shades of a NASA shuttle launch comes to mind! If my fuel tank was metal with a threaded hole in the bottom, installing a cut of valve would be a piece of cake. Unfortunately my tank is plastic. I'm using painter's tape to watch that fuel level as suggested. Thanks Tim_in_CT for pointing me to the older thread. I've emailed hogi to see where he found a cut of valve and how he installed it. If anyone else with a plastic tank has installed one and has a recommendation, I'd like hearing about it. Heck might as well do an inline fuel filter too.

  6. #6
    Platinum Member tmarks11's Avatar
    Join Date
    May 2005
    Posts
    834
    Location
    Seattle, WA
    Tractor
    Power Trac 422 (2005)

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    Quote Originally Posted by PTOuser View Post
    If anyone else with a plastic tank has installed one and has a recommendation, I'd like hearing about it.
    The bottom of the fuel tank has a (plastic) 1/4" npt female threads with a nipple threaded into it. You could thread a shutoff valve into it.
    -----------------------------------------------------
    Tim
    2005 PT-422
    4n1, LMB, minihoe, 48" mower, brush hog, Land Pride aerator, Herd spreader, auger, towing, forks, box blade, plow, box blade, tiller, trencher
    PT422 (6/23/05) photo page

  7. #7
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Posts
    18,922
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    They also make an in-line fuel shut off valve. Try a lawn mower shop.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  8. #8
    Epic Contributor MossRoad's Avatar
    Join Date
    Aug 2001
    Posts
    29,802
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    Quote Originally Posted by J_J View Post
    They also make an in-line fuel shut off valve. Try a lawn mower shop.
    I think J_J has the best quick solution here. Just find the I.D. of the fuel line and get the valve from a lawnmower shop. Then it is just a matter of cutting the line and sticking it in with a couple clamps for safety. Here's a link to some. Briggs and Stratton Carburetor Parts Repair Kits
    MossRoad

    Click On My Little Tractor
    To See Pictures And Videos
    Of It In Action!!!


  9. #9
    Elite Member BobRip's Avatar
    Join Date
    Sep 2004
    Posts
    4,363
    Location
    Powhatan Va.
    Tractor
    2000 Power Trac 422

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    Quote Originally Posted by J_J View Post
    They also make an in-line fuel shut off valve. Try a lawn mower shop.
    I have done this. It's easy.
    Bob Rip
    Tell me and I will hear.
    Show me and I will see.
    Let me do and I will learn.
    Let me fail and I will understand.

  10. #10
    Bronze Member
    Join Date
    Dec 2005
    Posts
    50
    Location
    No. California
    Tractor
    PT-425

    Default Re: 2 part gas to 1 part oil = unhappy 425 owner

    Quote Originally Posted by PTOuser View Post
    Returned from several months absence to my 425 with 36 hrs on. Tried to start 'er up ... no joy. Called Tazwell. Checked my oil level at their suggestion. It was way too high. I had about a gallon of gas diluting the oil. Anyone know why this happened? I've dealt with a lot of engines over the years but never had that happen before. Probably even more important, anyone know how to prevent a repeat of that from happening again? I thought cut off valve but that fuel line is really small diameter stuff!
    I just saw your message PTO. I just bought a Briggs and Stratton shut-off kit made for lawn mowers at Tractor Supply. They have one with I believe 1/4 inch barbed ends, just cut the existing line and install before the filter. You can just use zip ties as hose clamps, that's what PT did. You should be able to fins this at any Home Depot, Lowes, Ace Hardware ect., if not your local small engine repair shop will have it.

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