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Kohler K301 Block Question


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#1 dlang94 OFFLINE  

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Posted May 07, 2015 - 06:20 AM

I have a K301AS in a cub 122 that I think is a 1967, Ser. # C060544 Spec. # 4759B. I need to replace the block but don't know how to know if all of my parts will be usable in the new block. The one I found on ebay says it came from a 1968 cub 125 ser. # 279552 spec. # 47138B and says it is a K301AS block. 

http://www.ebay.com/...&_qi=RTM2067267

 

The spec numbers seem similar but I want to be sure they will be interchangeable and don't know much about this. Any help is much appreciated, thanks.


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#2 glgrumpy ONLINE  

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Posted May 07, 2015 - 06:30 AM

Can't rebuild yours?  I would think if you were going to go to diff block, a bore job or careful measure of bore and new piston, rings, and rod would be good idea. OR, can't just bore yours if bad bore and do same to it?  Cubs have diff pan and don't bolt down on flat pan like many, that is one of biggest issues with an engine change. A valve job then of course and all new gaskets and then rebuild the carb while it is all down also.


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#3 KennyP ONLINE  

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Posted May 07, 2015 - 07:25 AM

Look in the parts manual to see what parts will interchange. That lists as spec #, so should give you an idea!


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#4 propane1 ONLINE  

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Posted May 07, 2015 - 09:54 AM

See if he can get a picture of the bottom of engine where base bolts on, and send the picture to you. Oil slingers are different in some engines because of different bases, I think . Noel
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#5 dlang94 OFFLINE  

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Posted May 07, 2015 - 10:52 AM

Can't rebuild yours? I would think if you were going to go to diff block, a bore job or careful measure of bore and new piston, rings, and rod would be good idea. OR, can't just bore yours if bad bore and do same to it? Cubs have diff pan and don't bolt down on flat pan like many, that is one of biggest issues with an engine change. A valve job then of course and all new gaskets and then rebuild the carb while it is all down also.

One of the head bolts broke and I really messed it up trying to get it out. The block on eBay is from a cub just a 125 not a 122 like I have but it was the closet age wise I found to the engine I have. I'm going to check in the parts manual for spec numbers. The seller says it will work but I didn't know how to find out for myself if it will. I do have a service manual for my JD112 which has the same engine, that should help me with getting it all together. I am going to ask for a picture of the bottom of the block.
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#6 dlang94 OFFLINE  

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Posted May 07, 2015 - 12:57 PM

I ended up going with that block, it's comming from Joe's Outdoor Power. Looking forward to getting the engine built and running.

Thanks for the help!


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#7 Trav1s ONLINE  

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Posted May 17, 2015 - 10:06 PM

Looking forward to you build.  I am doing a k301 for my 312 and thought you might appreciate the work I am going on.  Pics of the engine work on pages 5 and 6:

 

http://gardentractor...1137-1977-312/ 


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