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  1. #1
    New Member
    Join Date
    May 2005
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    23
    Location
    Central Iowa
    Tractor
    JD G110

    Default 25 hp Kolher, sputters and dies

    I've got a 25hp kolher gas engine in my JD mower/tractor that was giving me fits tonight as I tried to plow. It would be running along fine at full throttle with partial choke, then start to sputter and die. As it started to sputter, sometimes I could save it for an extra minute by closing the choke down to almost shut. It would sit for a couple of minutes and wouldn't restart no matter what I tried to do. After a couple of attempts to start I smelled gas so I let it sit for about 5 minutes while I did some shoveling. I came back and she started right up. This whole process repeated about three times before I got the plowing done. I know the gas is a little suspect, as it's been sitting for a couple of months (I think the last fill up was mid-December; it's been a while between snows). But that doesn't seem to explain why it would start after sitting for a while. My plan is to put new gas in it and probably change the fuel filter, and maybe run some carb cleaner through it. Is there anything else I should try?

    Thanks,

    John

  2. #2
    Elite Member DieselPower's Avatar
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    Sep 2006
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    2,761
    Location
    Fairfield, PA
    Tractor
    JD 3020, JD 4230, JD 7410, JD 2440, MF 750, NH LS170

    Default Re: 25 hp Kolher, sputters and dies

    I got a used Craftsman garden tractor off of a friend a few years ago that was having similar problems. I had removed the fuel bowl off the bottom of the carb. It has a electronic needle valve assembly in it and it had a bunch of gum and varnish build up on it. I cleaned it out and ran some fuel injection cleaner through it (the kind you add to the gas) and it has run great ever since. Might be worth checking to see if yours is gummed up.

  3. #3
    Veteran Member
    Join Date
    Sep 2001
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    1,771
    Location
    Kansas
    Tractor
    Kubota L3000DT

    Default Re: 25 hp Kolher, sputters and dies

    Did it run OK the last time you used it? If so, I'd suspect ice. Drain the gas, fill it with E10.
    Meetings: If more than two people are there, at least one's time is being wasted.

  4. #4
    Veteran Member Hooked_on_HP's Avatar
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    Dec 2005
    Posts
    2,043
    Location
    Coal City IL
    Tractor
    Ford 1900 FWD Kubota F2100E

    Default Re: 25 hp Kolher, sputters and dies

    It soud like either the needle and seat are stuck or the fuel filter is pluged. You are on the right track with the filter and carb cleaner.

  5. #5
    Epic Contributor MossRoad's Avatar
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    Aug 2001
    Posts
    24,063
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: 25 hp Kolher, sputters and dies

    I'd check the fuel filter. I have a 25HP Kohler that did similar things last week. It would run at low throttle, but die at high throttle. Wait a while and it would run again and then die. Changed the fuel filter and O.K. Best of luck.
    MossRoad

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  6. #6
    Super Member
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    Sep 2000
    Posts
    6,553

    Default Re: 25 hp Kolher, sputters and dies

    If the fuel is supect, did you put Stabil in last time you used it?

    If not, you may want to put in some stabil and carb cleaner. New filters can't hurt and may help. Draining the tank and putting in new fuel with carb cleaner would be best but $$$.

    jb

  7. #7
    Veteran Member BTDT's Avatar
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    Sep 2006
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    2,209
    Location
    North Texas
    Tractor
    IH M Farmall-propane powered, H Farmall (father-in-laws), Ford 1300 diesel

    Default Re: 25 hp Kolher, sputters and dies

    Some folks used to recommend Seafoam. It's a gas additive. I put some in fuel tank on my Snapper with Briggs 12.5hp engine when it started running kind of rough. That stuff cleaned out the inside of my tank for sure. I had to dump carb bowl several times before it finally cleared up and started running right. Your use may vary.
    Praise is not something you do to get closer to God, praise is a response to God being close to you.

  8. #8
    Bronze Member
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    Nov 2006
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    64
    Location
    Holton, Kansas NO. of Topeka
    Tractor
    case 1835 uniloader,720K grasshopper,76 F350 with dump bed,cushman truckster with dump bed

    Default Re: 25 hp Kolher, sputters and dies

    I'd guess that the carb venturi is icing up from what little humidity is in the air. An air cooled engine won't heat the carb enough to keep the the air from freezing in these temps as it passes through the venturi.
    Growing old is inevitable,Growing up is optional

  9. #9
    Epic Contributor Soundguy's Avatar
    Join Date
    Mar 2002
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    48,758
    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: 25 hp Kolher, sputters and dies

    I've had brigs's do that... usually a fuel obstruction.. or a stuck fuel needle/flaot.

    Soundguy

  10. #10
    Elite Member sandman2234's Avatar
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    Dec 2005
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    4,108
    Location
    Jacksonville, Florida
    Tractor
    JD2555 and a few Allis Chalmers

    Default Re: 25 hp Kolher, sputters and dies

    I would bet Hooked on Hp and Soundguy are in the right ballpark with the gummed up needle and seat.
    David from jax

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