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  1. #1
    Silver Member
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    Feb 2009
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    227
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    south western michigan
    Tractor
    pt 425, JI Case, Gravely Comm.10A

    Default kohler block bolt pattern for Gravely

    my Gravely 10a commercial (1972) lost a rod it has a kohler 241s engine, the question is I was offered a kohler 241 engine, but before I make the drive I would like to know if the engine block mounting bolt pattern was special for the Gravely or would any 241 series engine would bolt up to the housing, I am currently searching for engine diagrams with specifications online, thanks in advance for any information

  2. #2
    Platinum Member
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    May 2003
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    696
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    NE PA
    Tractor
    AC 5020, Gravely Com12, JD M, JD X300R, WH 16 Auto

    Default Re: kohler block bolt pattern for Gravely

    I maybe mistaken but I think there are several variations of the engines blocks and the crankshafts,,, if all ya did was lose the rod and didnt crack the block just replace the rod, crank can usually be cleaned up with muratic acid ( the stuff liquifies aluminum).

  3. #3
    Silver Member
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    Feb 2009
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    227
    Location
    south western michigan
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    pt 425, JI Case, Gravely Comm.10A

    Default Re: kohler block bolt pattern for Gravely

    took some measurements on the donor motor and the bolt pattern was different but was still a 241 series unknown year though, will probably salvage the block from the original motor to ease reassembly of the engine to transmission

  4. #4
    Silver Member
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    Oct 2010
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    231
    Location
    Dallas, TX
    Tractor
    Gravely

    Default Re: kohler block bolt pattern for Gravely

    If it were me I would first check if the K241 block is really a K301 casting. If a K301 casting then I would have it bored for a K301 piston. If a K241 casting then I would find a K301S for a Gravely, rebuild it and bolt it on. You will thank me later if you make the upgrade to 12 hp.

    Last edited by RichardTX; 11-11-2011 at 07:12 AM.

  5. #5
    Veteran Member Kernopelli's Avatar
    Join Date
    Oct 2006
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    1,814
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    Carterville, Illinois
    Tractor
    Mitsubishi MTE2000D, Dig It 258 Backhoe

    Default Re: kohler block bolt pattern for Gravely

    I believe the K241, K301 and K321 may have all used the same block but you will have to do a little more investigating on Kohlers website to confirm. I suspect that if the OPs 241 donor engine has a different bolt pattern than the original engines, it may be that one is a K241 and the other is a K241A. The A designation is for the "special oil pan" (smaller) and that may account for the different bolt pattern.....pure speculation on my part but worth checking. If this is the case then the donor engine may be able to be used with the simple swap of oil pan/engine mount from the old motor to the new one. One thing about Kohler is they always used a lot of common aspects for series model engines. Their website is an absolute wealth of information. Excellent owner and service manuals are available there as well as the ability to cross reference parts and what all engines a specific part was used in.

    I once called Kohler about some specific questions regarding a K series engine 4-5 years ago and was surprised how knowledgeable and easy it was to talk to a tech and get some good answers. I have no idea now where I got the number or who/what dept. I ask to speak with at the time but it was surely off their website.

    To look up parts PBS Net-Compass (enter as guest)
    for manuals Kohler Engines: Owners and Service Manuals: Manuals and Maintenance
    Last edited by Kernopelli; 11-11-2011 at 09:56 AM.
    Darryl

  6. #6
    Silver Member
    Join Date
    Feb 2009
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    227
    Location
    south western michigan
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    pt 425, JI Case, Gravely Comm.10A

    Default Re: kohler block bolt pattern for Gravely

    more power is always better will investigate both blocks closer, thanks

  7. #7
    Silver Member
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    Oct 2010
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    231
    Location
    Dallas, TX
    Tractor
    Gravely

    Default Re: kohler block bolt pattern for Gravely

    I have a K241 from a C10A Gravely that needs a rebuild. It does NOT have K301 embossed on the block and the block cannot be bored out to make a K301 from it. There just isn't enough metal there.

    There is an adapter plate that is bolted to the PTO side of the engine for the Gravely.

    Be careful with the gears on the end of the crank. They are pricey.

  8. #8
    Gold Member
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    Jul 2007
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    252
    Location
    Cleveland Tenn

    Default Re: kohler block bolt pattern for Gravely

    Here is a crank end of a Kohler for Gravely.
    Ck out the bolt pattern and more important
    Is what I call on the adapter a counter bore
    It is really a boss on the engine that fits inside the adapter.
    Attached Thumbnails Attached Thumbnails kohler block bolt pattern for Gravely-dsc08223-jpg  

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