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Kohler K321 Crankshaft



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#1 EricFromPa ONLINE  

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Posted January 30, 2018 - 03:09 AM

I'm looking for a good used STD Journal Crankshaft for a K321. PTO end needs to be 3 1/2" long and 1 1/8" diameter. I would like to find one with a perfect 1.500 journal.

 

The Crank in my beautiful JD 214 is out of round. I just got my new calipers yesterday morning and Measured it 1.488 on the low side and 1.494 was the highest.  

 

 

If anyone had a good one laying around that they are not using please let me know.

 

 

Thanks guys

 

Eric


Edited by EricFromPa, January 30, 2018 - 04:42 AM.


#2 framesteer ONLINE  

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Posted January 30, 2018 - 02:52 PM

May be easier to find a .010 or .020 undersize rod and have your crank ground to match than to find a "perfect" standard size crank.to match with your existing (likely worn) rod.



#3 EricFromPa ONLINE  

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Posted January 30, 2018 - 08:29 PM

I allready purchased a good quality master rebuild kit for the K321. All STD sizes so I need a crank. There are a few good 1.498-1.500 crankshafts on Ebay but I can't afford the $149-$199 that they want for them.

 

I know where there is a good K241 crank but I'm not sure if the 10 and 14hp crankshafts are the same. Both of them are 3 1/2 inch x 1 1/8 inch on the PTO end. 

 

I have been looking for info but haven't found anything confirming that it will work.


Edited by EricFromPa, January 30, 2018 - 08:36 PM.

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#4 dodge trucker ONLINE  

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Posted January 30, 2018 - 08:46 PM

or send your old rod to Brian Miller and have him machine your rod for inserts like a car engine has to what ever undersize the crank comes out to.... I think he charges like $25 for the service.



#5 KennyP ONLINE  

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Posted January 31, 2018 - 06:56 AM

I allready purchased a good quality master rebuild kit for the K321. All STD sizes so I need a crank. There are a few good 1.498-1.500 crankshafts on Ebay but I can't afford the $149-$199 that they want for them.

 

I know where there is a good K241 crank but I'm not sure if the 10 and 14hp crankshafts are the same. Both of them are 3 1/2 inch x 1 1/8 inch on the PTO end. 

 

I have been looking for info but haven't found anything confirming that it will work.

The K241 has a 2.875" stroke. The K321 is 3.250 stroke. The Service Manual has the bore & stroke.  The crankshaft reference manual would give you end configuration if you have the crank part #.


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#6 EricFromPa ONLINE  

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Posted January 31, 2018 - 04:26 PM

Thanks Kenny.

 

I've only had to replace a Crank on 6 other engines and 4 of those were out of K161 and k181 blocks. Other 2 were K301s out of blown up Cub Cadets. I've worked on every single cylinder from K91-K341 including 2 very early (pre 1964) (I hate to say it but they are "rare")  2 7/8" small bore K181s that I call K141/k161 strokers because they use a standard K181 crank and rod in a small bore K141/K161 block. The 2 7/8" bore blocks are hard to find rings for but I found someone across the pond in Greece that makes custom sized rings reasonable.

 

This fella can make rings for pretty much any small engine if you give him dimensions.

https://www.ebay.com/usr/dandrikop

 

 

Looks like any 3 1/8" keyed x 1.125 Crank from K301-K361 will work. Kohler 45 142 21-S is the crank that I need. Gota love how they measure them by Inch Fractions and Decimals in the manual lol.

 

Found 1 reasonably priced on Ebay that I'm going to ask him to measure the Journal on. $65 shipped isn't bad if it's a good crank.

https://www.ebay.com...W4AAOSwOA1Z86Xd


Edited by EricFromPa, January 31, 2018 - 04:28 PM.

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#7 KennyP ONLINE  

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Posted January 31, 2018 - 05:00 PM

Good luck!


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#8 Mark 149 J. OFFLINE  

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Posted January 31, 2018 - 07:53 PM

I could be wrong but when I was looking for a crank for my K321 I was told that the 10 and 12 hp cranks would not work for the 14 or the 16 hp motor.  I was finally able to fine one on ebay for $99 plus shipping for a 14 hp motor.  Good luck!



#9 LilysDad ONLINE  

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Posted January 31, 2018 - 07:54 PM

The K321,341 & 361 crankshafts are interchangeable. The K301 is interchangeable except it is balanced different for a lighter piston.

http://gardentractor...com/balance.htm


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#10 Mark 149 J. OFFLINE  

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Posted January 31, 2018 - 08:12 PM

The K321,341 & 361 crankshafts are interchangeable. The K301 is interchangeable except it is balanced different for a lighter piston.

http://gardentractor...com/balance.htm

Based upon what I read, you can use the K301 crank but you would need to have it balanced for the heavier piston and rod of the 14 hp motor.  That would require more money to have more weight added and balance making it more expensive then buying an actual 14 hp crank. IMO


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#11 EricFromPa ONLINE  

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Posted February 05, 2018 - 04:42 AM

Bump!

 

Still looking for a crank.

 

 

I contacted Ethan but I doubt he has anything usable. He has a bunch of kohler engines but most of them are worn out or blown up. I would probably have to pull 1/2 dozen engines apart to find a usable crank.



#12 LilysDad ONLINE  

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Posted February 05, 2018 - 06:35 AM

Brian Miller has them for $125 + S&H.


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