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  1. #1
    Veteran Member GreenRules's Avatar
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    Apr 2002
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    Casco, Maine
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    New Holland t5040 Kubota L275JD 4110, 110. , 325, GT 225, 214, 112

    Default FARMALL CUB FOULING PLUGS

    MY BROTHER'S CUB GOES THROUGH A SET OF PLUGS ABOUT ONCE EVERY COUPLE OF WEEKS DEPENDING UPON HOW MUCH HE USES IT. IT DOES SMOKE A LITTLE. IS THE ENGINE IN NEED OF A REBUILD?

  2. #2
    Platinum Member
    Join Date
    Aug 2001
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    990
    Location
    Winchester, New Hampshire
    Tractor
    Kubota L3000

    Default Re: FARMALL CUB FOULING PLUGS

    I also have an older tractor which will foul a spark plug every couple of weeks. There are a
    couple of old tricks to lengthen the time before you have to change the plugs. One is to pull the plug
    wire just a little bit off of the end of the spark plug, this causes the spark to jump this gap you
    created and a slightly fouled plug will start working again. There used to be a product for sale
    which you placed between spark plug and wire to do the same thing.

    One other thing you can try is change to a higher heat range plug if they are available in the size you
    need. The numbers have been changed in the past few years but my Ford calls for H-10 plugs, I have
    used H-12 plugs with good results. Ask a good auto parts supplier for a little hotter plug.

    The truth of the matter however is the rings on your tractor are not sealing like they once did, now
    a little oil is added to the combustion chamber as the engine runs evidenced by the smoke you see.
    Might be almost time to give your tractor engine a little overhaul.

    Randy

  3. #3
    Veteran Member BillyP's Avatar
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    Dec 2002
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    1,768
    Location
    Eagletown, OK
    Tractor
    JD 4610 ehydro MFWD

    Default Re: FARMALL CUB FOULING PLUGS

    It could be oil fouling your plugs or gas. If the carb is running too rich, it can foul plugs in no time. If you do go to a hotter plug, be sure to get them from someone that knows their business. To hot of a plug can burn holes in the pistons.

  4. #4
    Veteran Member Dozernut's Avatar
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    Apr 2002
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    1,493
    Location
    South Eastern Illinois
    Tractor
    Kubota L4610, ZD21, RTV900, B2630

    Default Re: FARMALL CUB FOULING PLUGS

    That old of a tractor has to have bad valve seals. The rubber seals do wear out and oil will foul the plugs. For under $10.00 and some elbow grease you can replace them. This might or might not cure the problem. Do a compression test on the cylinders first to see where you stand.

  5. #5

    Join Date
    Jan 2003
    Posts
    21
    Location
    Durham NC
    Tractor
    farmall cub, ford 8n, kioti LB 1914 w/fel

    Default Re: FARMALL CUB FOULING PLUGS

    The standard plug for the cub is a D15y champion. I use a hotter d18y in mine. The d21 is hotter yet, it's a shorter plug but it will work. A plug fouler may be a last result, although it may space the plug too close to the gas tank, you'll have to check the clearance.

  6. #6
    Veteran Member GreenRules's Avatar
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    Apr 2002
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    Casco, Maine
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    New Holland t5040 Kubota L275JD 4110, 110. , 325, GT 225, 214, 112

    Default Re: FARMALL CUB FOULING PLUGS

    Thanks for all the help. I'll try checking the seals and getting some hotter plugs.

  7. #7
    Epic Contributor jinman's Avatar
    Join Date
    Feb 2001
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    20,950
    Location
    Texas - Wise County - Sunset
    Tractor
    NHTC45D, NH LB75B, Ford Jubilee

    Default Re: FARMALL CUB FOULING PLUGS

    See if you can find some spark plug anti-foul adapters. You screw them into the spark plug hole and then screw the plug into them. I have used them on a Ford Jubilee for over 8 years and they work great. Plugs that used to be replaced every two weeks now last 6 months.

  8. #8
    Gold Member Harrygoodwrench's Avatar
    Join Date
    May 2003
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    329
    Location
    Upstate New York
    Tractor
    2003 JM 224, LN1714 Kioti

    Default Re: FARMALL CUB FOULING PLUGS

    You can get a wealth of help on your Cub problems at www.farmallcub.com or at ATIS.net (there is a discussion section there). All sorts of data, manuals, etc...........hope this helps. [img]/forums/images/graemlins/cool.gif[/img]

  9. #9
    Veteran Member GreenRules's Avatar
    Join Date
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    Location
    Casco, Maine
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    New Holland t5040 Kubota L275JD 4110, 110. , 325, GT 225, 214, 112

    Default Re: FARMALL CUB FOULING PLUGS

    JACKPOT!!! THANKS! [img]/forums/images/graemlins/grin.gif[/img]

  10. #10
    Veteran Member joes_427_vette's Avatar
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    Aug 2004
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    1,243
    Location
    Midwest
    Tractor
    New Holland TC 55 DA, 4110 John Deere, HT 20 Bolens, 1456 Bolens

    Default Re: FARMALL CUB FOULING PLUGS

    Do a compression test. That should tell the story if it is rings or another source. I had a similar problem with mine. I took the motor out and noticed the rings were perfectly lined up with each other. The good news is parts are super cheap. Put in rings, rod and main bearings, seal kit, for less than $150.00. Runs strong now and almost twice the power. Very simple to work on and quality built. Makes a great mower tractor with good visibility.

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