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Docwheelhorse

Bore x Stroke of Kohler 10/12/14

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Hello All,

need to find a Magnum 12 for another member here... I have a few Mags that have had there tin borrowed etc.... and only way I can figure to find a 12 is by measuring bore and stroke.

 

I know I could google or look around here--but figured maybe somebody has the info real handy.

 

Thanks

Tony

 

 

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Measuring the bore is the only absolute way. I picked up a magnum two weeks ago marked "301" on the crank output shaft side of the casting and it had a 10HP bore.

10hp bore 3.250", 12hp bore 3.375"

Model BxS  K241 (10) 3.251 x 2.875.............K301 (12) 3.375 x 3.250.............. K321 (14) 3.500 x 3.250........... K341 (16) 3.750 x 3.250

12, 14 and 16 show same stroke

 

Edited by OILUJ52
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7 hours ago, Docwheelhorse said:

I take it theres no stroke difference for 10/12/14?

 

12,14 and 16 have the same stroke, 10 is different 

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On 2/28/2018 at 8:23 AM, OILUJ52 said:

Measuring the bore is the only absolute way. I picked up a magnum two weeks ago marked "301" on the crank output shaft side of the casting and it had a 10HP bore.

10hp bore 3.250", 12hp bore 3.375"

Model BxS  K241 (10) 3.251 x 2.875.............K301 (12) 3.375 x 3.250.............. K321 (14) 3.500 x 3.250........... K341 (16) 3.750 x 3.250

12, 14 and 16 show same stroke

 

 Yep he’s right on the money. 

FYI: when the production line was moving they didn’t stop it if they ran out to k241 blocks. They used k301 blocks. The k301 blocks bored at 3.251 can be bored all the way up to 3.415 which will be +40 over for a k301. 

 

 

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