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HP differences in K301 engines

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Michael Crowe View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Michael Crowe Quote  Post ReplyReply Direct Link To This Post Topic: HP differences in K301 engines
    Posted: 16 May 2021 at 9:06pm
What was the internal difference in the Koehler 301 engines in the 700 series garden tractors to get the 10,12,14 and 16 hp ratings.

My 712S I bought new as a kid mowings yards was rebuilt back in the 1980’s and it’s plum tired. If it’s simply a matter of a different piston or maybe boring it out to a larger piston size I’m thinking I’d like to make it a 16 hp engine.

Also where is the best place to get the parts? I’d like to get a new standard crank and make it brand new on the inside. Thanks michael
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ACmowerguy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ACmowerguy Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2021 at 9:50pm
Unfortunately its not that simple. I believe the blocks are different thicknesses. Each has the model cast into the front of the block. Some of the K241 (10hp) engines used a K301 block, which meant it had a thicker cylinder wall. Other than that each model had its own specific block. The counterweights are smaller on the K301 crankshaft compared to the K321/K341. 
10 various B-series garden tractors, AC Homesteader8, 416 hydro,710 gt, and many misc attachments
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Coke-in-MN View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2021 at 9:31am
I ordered parts from this place - best price I could find and quick delivery .

Thank you for your order from MFG Supply. Once your package ships we will send an email with shipping information. If you have any questions about your order please contact us at sales@mfgsupply.com or call us at 1-800-826-8563.

Your order confirmation is below. Thank you again for your business.

Your Order # (placed on July 30, 2019 3:58:31 PM CDT)

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Koeckeritz Excavating
1118 Neal Ave S
Afton, Minnesota, 55001
United States

 




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Koeckeritz Excavating
1118 Neal Ave S
Afton, Minnesota, 55001
United States
 
 Shipping - Standard Shipping  

ItemSkuQtySubtotal
23-6765 - Kohler K301 & K321 12, 14 & 16 hp Conn Rod23-67651$21.14
23-3534 - Kohler 235057 Base Gasket (for models w/shallow pans)23-35343$5.13
23-2750 - Kohler 45-041-17 Head Gasket23-27501$6.91
Subtotal$33.18
Shipping & Handling$6.99
Grand Total (U.S. Dollars)$40.17
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Coke-in-MN View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2021 at 9:49am
Have 2 - K341 engines as cores as I replaced engines with Honda V 18 HP in my New Holland S16  tractors . One has been rebuilt once before - other had balance gear break and it took dipper off rod cap .  Somewhere I also have a Tecumseh 16 HP- OHV with bad rod that I used in the S16 for 5 years.  
 Bought a Ariens tractor with a K341 - 16 HP with a bad base gasket for $300 with snow blower and 54" mower deck .
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
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Michael Crowe View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Michael Crowe Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2021 at 1:40pm
Thanks for the information guys. I really appreciate it. I was hoping I could just bore it out but I see that’s not the case. Coke I sent you an email. If either of your 341 blocks are rebuildable I’d be interested. Michael
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Doug Acord View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Doug Acord Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2021 at 8:14pm
At one point in time you could bore at 12 horse to a 14 .030 spec If you could get the piston. The 12 horse and the 14 horse have the crankshaft. The 10 though the 14 are all the same block but the 10 horse has a smaller crank then both the 12 and 14.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2021 at 1:56pm
Those old K341 blocks are getting tough to find. My nephew needed a block for his 716H and found a good rebuildable block out of a Wheel Horse Tractor. Had to make a small change on somthin' but I don't recall what it was that needed to change. Wasn't a biggy that's fir' sure..... Kirk engines has a lot of Kohler information and cool stuff.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 18 May 2021 at 9:48pm
12, 14, 16 all use the same rod - 
Wheel Horse built their tractor so oil pan was part of tractor and block mounted to it . I have a 12 in a wheel horse out back that i got a few years back - ran but smoked , might have a couple starter motors for those engines also as I went through a couple 

Edited by Coke-in-MN - 18 May 2021 at 9:52pm
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DaveWisc. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DaveWisc. Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jun 2021 at 7:41pm
Try Isavetractors on the internet I got piston rod and gaskets there
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2021 at 5:51am
re: Wheel Horse built their tractor so oil pan was part of tractor and block mounted to it .

and here I thought only Ford did that with their LGT125 series......
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 21 Aug 2021 at 11:21am
Still have those Kohler K341 engines if anyone want's to go bigger on their machines . 
Neighbor just had to buy a head for his MF tractor with a K341 - cost him $120 for the head alone as his stripped the spark plug hole and helicoil he had put in stripped out also so could not do it a 2nd time .
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
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