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  1. #1
    Member
    Join Date
    Mar 2008
    Posts
    25
    Location
    Pacific Northwest
    Tractor
    Yanmar 155d

    Default Kohler K241 Engine Spark Issue When Hot.

    Hey All-

    I've got a Kohler K241 10hp that will start and run great when cold. It will warm up and run great when hot too. The problem is when I start it hot, it will start and idle rough and the second I put any throttle to it the engine will die.

    I am fairly certain this is a spark related issue because applying the choke will totally flood the engine- there is plenty of fuel. The points and condenser are new. The timing is set perfectly (I set it static, then checked it with a timing light). It has a magneto ignition system.

    I have an idea what it is, but I'm not too familiar the Kohler K series and would like another opinion.

    Thank you!
    Last edited by Powerlinefixer; 04-12-2011 at 12:36 AM. Reason: spelling error
    Yanmar 155d. 15 Horses under the hood and you can hear every one of them.

  2. #2
    Veteran Member
    Join Date
    Jan 2010
    Posts
    2,380
    Location
    Northern, IL
    Tractor
    Branson 2400H

    Default Re: Kohler K241 Engine Spark Issue When Hot.

    Quote Originally Posted by Powerlinefixer View Post
    Hey All-

    I've got a Kohler K241 10hp that will start and run great when cold. It will warm up and run great when hot too. The problem is when I start it hot, it will start and idle rough and the second I put any throttle to it the engine will die.

    I am fairly certain this is a spark related issue because applying the choke will totally flood the engine- there is plenty of fuel. The points and condenser are new. The timing is set perfectly (I set it static, then checked it with a timing light). It has a magneto ignition system.

    I have an idea what it is, but I'm not too familiar the Kohler K series and would like another opinion.

    Thank you!
    Had the same problem with a K301 at it turned out to be the main ignition coil. When cold it tested fine but once warm tractor would run rough at idle and not rev up at all. May want to check the points and condensor just to make sure they are not damaged either. I replaced everything and tractor has run good for several years now.

    Roy
    Artificial Intelligence will never overcome natural stupidity.

    Branson 2400H MMM & FEL

    JD 112

    BX1850 gone but not forgotten

  3. #3
    Member
    Join Date
    Mar 2008
    Posts
    25
    Location
    Pacific Northwest
    Tractor
    Yanmar 155d

    Default Re: Kohler K241 Engine Spark Issue When Hot.

    I was pretty sure that's what it was.

    The magneto is special and I don't know if it's even available. It has a flashing coil (three wires and a spark wire instead of one wire and a spark wire) because this engine is on a welder.

    I think I'm going to convert it to battery ignition.

    Thanks!
    Yanmar 155d. 15 Horses under the hood and you can hear every one of them.

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