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  1. #1

    Join Date
    Sep 2001
    Posts
    424
    Location
    Upstate NY
    Tractor
    Kubota B7100DT

    Default Smokey Kubota

    I have a late 70s B6000E in mint condition that seems to always run a little smokey. Under normal conditions you cannot see the blue tint to the exhaust, but on a sunny afternoon it is quite visible. The machine runs great, and I am told by the previous owner that the injectors are only a year or two old. Is this normal for an older diesel?

  2. #2
    Gold Member hosejockey2002's Avatar
    Join Date
    Mar 2002
    Posts
    403
    Location
    Auburn, WA
    Tractor
    Kioti CK20 HST

    Default Re: Smokey Kubota

    My 1981 or so Yanmar is the same way. I think it's pretty normal for a diesel to smoke like that. As long as it starts easily and has good power there's probably nothing wrong with it.

  3. #3
    Veteran Member
    Join Date
    Jul 2000
    Posts
    1,344
    Location
    West Virginia (Eastern Panhandle)
    Tractor
    '78 Kubota B6100DT

    Default Re: Smokey Kubota

    My late 70's B6100 is the same way too. I can particularly see the smoke when it's dark out with the headlights on, not so much during the day. So I was thinking it had something to do with cold weather since I don't drive it at night during the summer.
    I've been hoping it was "normal" so now that I know there's at least two others I'm feeling more comfortable.

  4. #4
    Veteran Member Carl_NH's Avatar
    Join Date
    Apr 2002
    Posts
    1,943
    Location
    Coastal NH
    Tractor
    01 Kubota B21TLB, 2010 Ferris 52" ZTR, Cub Cadet 1811, Gravely Super8

    Default Re: Smokey Kubota

    Steve,

    I saw the same in sunlight with the L185 I had - 900 + hours never used oil, started/ran well and was miserly on fuel. So suspect it's normal unless air/fuel mixture is off.

    I have an 87 300 diesel MBenz that is similar, but once when it seemed like a little more than usual, I started looking for a cause.. Well, seems mice decided to make a nest in the air filter with insulation which restricted the air flow, thus the problem. So I fired the cats, and put out some mice bait and never had a problem since..

    The newer engines have different head/cylinder configurations (cars and tractors) and don't seem to do this is my experience.

    Carl




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