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  1. #11
    New Member
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    Nov 2012
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    22
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    Western Wisconsin
    Tractor
    Kubota L3430 HST, LA723 loader

    Default Re: Engine stalls after 20 minutes, gas starved?

    Good idea. I will try that first. How do i run off of small tank with out activating fuel pump from rear tank? Just clamp the tank line and start?

  2. #12
    New Member
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    Nov 2012
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    Western Wisconsin
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    Kubota L3430 HST, LA723 loader

    Default Re: Engine stalls after 20 minutes, gas starved?

    -photo-jpg

    see picture, also it is setup to shut off the gas so engine has always run for short while after key turned off.

  3. #13
    New Member
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    Nov 2012
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    Western Wisconsin
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    Kubota L3430 HST, LA723 loader

    Default Re: Engine stalls after 20 minutes, gas starved?

    Quote Originally Posted by orangebruce View Post
    -photo-jpg

    see picture, also it is setup to shut off the gas so engine has always run for short while after key turned off.
    Turns out I was lucky (so far). I changed out the fuel filter and I am back in business! Thanks all for help and ideas.

    The use of the small tank proved to help me isolate the problem until I could get the new filter.

    FYI the new filter does not fill up solid with fuel either. I wonder if that is even relevant? Engine works under a load now and was able to clear the driveway. Thanks again.
    Bruce

  4. #14
    Super Star Member
    Join Date
    Mar 2008
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    11,497
    Location
    Northern Fingerlakes region of NY, USA
    Tractor
    Kubota L3830GST, B7500HST, BX2660

    Default Re: Engine stalls after 20 minutes, gas starved?

    Quote Originally Posted by orangebruce View Post
    FYI the new filter does not fill up solid with fuel either. I wonder if that is even relevant? Engine works under a load now and was able to clear the driveway. Thanks again.
    Not relevant IMO, most of the ones that I have seen dont fill up all of the way.

    Aaron Z
    A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
    Robert Heinlein, Time Enough for Love

  5. #15
    Bronze Member
    Join Date
    Oct 2010
    Posts
    57
    Location
    Southern Maryland
    Tractor
    Kubota L2850, 8N

    Default Re: Engine stalls after 20 minutes, gas starved?

    Had a similar problem. Rebuilt carb again and again. Changed fuel filters. Fooled around with gas cap in case vent was blocked. Turned out the fuel line from the tank had been destroyed by the E10. The weakened line kinked where it left the tank and made a 90 turn towards the engine. Line looked ok, but was weak internally and it closed off the gas flow. Took me months to figure it out.

  6. #16
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
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    49,272
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    Central florida
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    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Engine stalls after 20 minutes, gas starved?

    glad you got her going.

    sometimes esier to troubleshoot them if you braek them into smaller pieces to diagnose.

  7. #17
    New Member
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    Nov 2012
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    Western Wisconsin
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    Kubota L3430 HST, LA723 loader

    Default Re: Engine stalls after 20 minutes, gas starved?

    Quote Originally Posted by Soundguy View Post
    glad you got her going.

    sometimes esier to troubleshoot them if you braek them into smaller pieces to diagnose.
    Okay now I am back with the same problem! Too little fuel? Since last post: I replaced plugs, and fuel pump since last one was almost 20 years old and was old square metal design. I was told they don't make the square metal any more since more vulernable to vapor lock? The new one is round black plastic and only $20. When I replaced fuel pump I noticed a little oil in the pulse line. I think that is not good? Oil level is fine and clean. What is the meaning? Air filter is Clean. My First post has all the engine codes.

    When I then started her up again after installing all new stuff, Engine ran rough at start up and spewed out white blue smoke for a while until it settled down. Which it has done occasionally before. Once warmed up I closed choke and everything seemed fine maybe stronger then before until 20-30 minutes of running under a load of blowing 2"-3" of snow. We are getting hit this March.

    Funny thing when I run off of gravity feed aux tank engine runs well. starts better? No smoke. Hard to run for too long under load with aux tank since small and ackwardly mounted. Maybe I will try to recreate stalling under load with aux tank.

    Thanks for any advice.
    Bruce

  8. #18
    Super Star Member
    Join Date
    Mar 2008
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    11,497
    Location
    Northern Fingerlakes region of NY, USA
    Tractor
    Kubota L3830GST, B7500HST, BX2660

    Default Re: Engine stalls after 20 minutes, gas starved?

    What happens if you disconnect the gas line from the tank (before the filter and pump) and just let it run into a container (with the tank cap on) for 10 mins?
    That should let you diagnose a tank blockage or cap vent failure issue fairly easily.

    Aaron Z
    A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
    Robert Heinlein, Time Enough for Love

  9. #19
    Elite Member Don87's Avatar
    Join Date
    May 2010
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    4,226
    Location
    SW Pa.
    Tractor
    Massey Ferguson GC2400

    Default Re: Engine stalls after 20 minutes, gas starved?

    I had the same type of problem when I ended up with spiders and other bugs in my fuel tank.
    Don

    MF GC2400, FEL, 60in.MMM, 5ft. Cultivator, Single Bottom Plow, Bush Hog RTC48 tiller, MF 2360 front mount snowblower, 5ft backblade. BXpanded Piranha toothbar.

  10. #20
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
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    Location
    Central florida
    Tractor
    ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC

    Default Re: Engine stalls after 20 minutes, gas starved?

    ditto what the last 2 posts said. run straight from a tank.

    on in the oil could mean bad diapragm

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