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kohler motor leaking oil

Discussion in 'Mechanic and Repair' started by 2low4NH, Jun 2, 2009.

  1. 2low4NH

    2low4NH LawnSite Bronze Member
    from NH
    Posts: 1,891

    hey i have an exmark metro with the 15 horse kohler motor on it. it seems ike its leaking oil from the output shaft on the motor. is this an easy repair or am i looking at spending big bucks? im due for an oil change and i would like to do it myself what oil is best to use for these mowers?

    SILVERSTREAK INC LawnSite Senior Member
    Posts: 295

    on these engines nowadays there is no easy repair, there is a chance you could get a new bottom case and replace that.

    my electric clutch took out 2 25hp kohlers in the last month, so im a little fumed right now, i was sold a shorted out clutch which electrolosised the motors causing the output shafts to leak bad

    you can try taking off the belts and seeing how much play you have, the seal is replacable, but if youre noticing a good bit of play then replacing the seal wont help for more than 10 minutes or so

    if your seal is leaking go with a heavier oil, such as 20-50 or straight 60 or something, if youre trying to get more time out of it.

    normally everyone says to run a straight 30 weight oil sae30 but lots of people on here say to run diesel oil, as it has better heat qualities so diesel 15-40

    i always used mobil one 10-30 until my mechanic said to stick with a straight 30, which will not become thinner as it gets hot
  3. 2low4NH

    2low4NH LawnSite Bronze Member
    from NH
    Posts: 1,891

    theres no play on the output shaft at all just a slow oil leak. you can see where its dripping down on the belt then spitting off under the deck cover.
  4. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    Do not use anything accept for 10w 30 in a kohler with hydrolic lifters.
  5. 2low4NH

    2low4NH LawnSite Bronze Member
    from NH
    Posts: 1,891

    why is that i thought almost all small motors should take sae30
  6. VegetiveSteam

    VegetiveSteam LawnSite Senior Member
    Posts: 297

    Kohler has always recommended 10W30 oil in their Command and Courage engines. Until recently that is. Kohler now states that above 50 degrees farenheit you can use straight 30W oil. Kohler's recommendation is still 10W30 but at your option you can use 30W if you so desire above ambient temperatures of 50 degrees farenheit.

    Now back to your problem. Is this a vertical shaft engine and does it have an electric clutch on the engine?
  7. 2low4NH

    2low4NH LawnSite Bronze Member
    from NH
    Posts: 1,891

    vertical shaft belt drive to tranny and deck. no clutch

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