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  1. #1
    Join Date
    Aug 2011
    Cub cadet 1250

    Default Leakink fuel pump

    My cub 1250 has a kohler magnum 10 engine and was leaking oil from where the fuel pump bolts to the block. I have gone ahead and changed the gasket and its still leaking any ideas ??

  2. #2
    Veteran Member Carl_NH's Avatar
    Join Date
    Apr 2002
    Coastal NH
    01 Kubota B21TLB, 2010 Ferris 52" ZTR, Cub Cadet 1811, Gravely Super8

    Default Re: Leakink fuel pump


    I have a 1811 and just replaced the fuel pump last month - its the lever action type pump runs off a camshaft near the top of the engine.

    The bodies of the fuel pump are a hard plastic (at least mine were) and if its still leaking I would suspect a broken body or possibly a warped pump base. These pumps and seals inside dont last with the methanol in gas these days.

    You can find replacement pumps on ebay - kohler OEM type - thats what I did and now my 18HP magum starts much faster with very little choking required.

    Do you notice the oil level increasing or smelling like gas? If so your pump is leaking gas into the oil - it starts out slow and over time increases and eventually they wont start, also the leaking/seaping of gas in the area could degrade the gasket and look like an oil leak.
    Kubota B21TLB, Ferris IS2000, Cub Cadet 1811

  3. #3
    Join Date
    Aug 2011
    Cub cadet 1250


    Thanks for the info , sounds like we've got the same pump. I'm going to take mine off again and check the housing for cracks.

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