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  1. #1
    New Member
    Join Date
    Nov 2012
    Posts
    1
    Location
    Plain,WI
    Tractor
    John Deere 3020 4020 4010

    Default John Deere 3020

    I have a 1967 3020 gas tractor. I have installed an electronic ignition. I have re-built the carbeuator. It still fouls the plugs. What can I do?

  2. #2
    Gold Member
    Join Date
    Nov 2007
    Posts
    478
    Location
    PA
    Tractor
    Kubota L3130 HST 4x4

    Default Re: John Deere 3020

    Is it fouling because of excess carbon (dry) or from oil (wet looking)? If it is from carbon running too rich or not firing completely 1) Check the plug wires to make certain they are ok. An ohm meter will work great to prove they are ok. 2) Perhaps the spark plug heat range is too cold. 3) make certain the float level is correcly set. 4) air bleeds in carb could be plug 5) Choke closed or not opening completely
    Kubota L3130 HST 4x4, FEL LA723 w/QA, Backhoe BH90, Snow Blower: L2185 72" front mount, 7' back blade, carry all, 48" Pallet Forks w/QA, Sun Shade, Turf tires & Rubber Chains for the winter, Extra forward and rear lighting. BearCat 73454 Wood Chipper. LandPride RCR2672 Rotary Cutter. Approximately 290 hours

  3. #3
    Platinum Member BIG DOOLEY's Avatar
    Join Date
    Aug 2012
    Posts
    602
    Location
    MICHIGAN
    Tractor
    JOHN DEERE 2320

    Default Re: John Deere 3020

    Plug wire rule of thumb is usually no more that 4000 ohms per foot of wire if my memory is right.
    Tom
    2012 JD 2320, HOMEMADE CANOPY, 54" FRONT BLADE, 54" MID DECK MOWER, HYDRAULIC ANGLE 60" REAR BLADE, QUICK HITCH, STAINLESS FRONT MOUNT SPRAY TANK W/BOOM, 200CX LOADER W/ 61" BUCKET, HOMEMADE BALLAST BOX,HOMEMADE BUCKET GRAPPLE
    1998 "BIG DOOLEY" Chevy K3500 Crew Cab (36.000 miles & counting)

    United Steel Workers Union 12934

  4. #4
    Veteran Member
    Join Date
    Apr 2004
    Posts
    2,106
    Location
    East Coast of Lake Huron
    Tractor
    Deere, several

    Default Re: John Deere 3020

    If the coolant temp is too low , the mixture too rich or the engine worn and burning a high ash oil. It will foul any plug. Putzing around at light load and with coolant temp under 195F is a common problem.
    All too often the mixture is too rich from 35 years of dirt in the air inlet pipe work or aircleaner. A choke blade that is partly closed even through the choke knob is fully inserted is all too common.
    If it's oil fouling. Use low ash SF-2 Shell Rotella T1 50 weight intended for two stroke Detroit Diesels.
    Use solid core wires and Autolite 3116 plugs.

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