kdropper1322@aol.com 2 #1 Posted June 12, 2019 Hey Guys, So my K241 motor seized up and needs to be rebuilt but for the time being i have a spare K121 motor 8HP kohler on the side that will run. Will that motor work on my C121 Tractor and if so is there anything specific i should be looking for to change while in the process? Thanks in advance. Regards, Nate Share this post Link to post Share on other sites
Achto 27,908 #2 Posted June 12, 2019 (edited) 1 hour ago, kdropper1322@aol.com said: i have a spare K121 motor 8HP kohler I would like to see a picture of the engine ID plate on that k121. The Kohler K121 is a pretty rare engine, I believe it was rated at 6hp. Electric start & dual exhaust ports were some standard features on the K121. Another member on this forum came across one a while ago. Here is a link to his post. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=2ahUKEwjQr7qlyuTiAhXnqlkKHZ73Ad0QFjADegQIAxAB&url=https%3A%2F%2Fwww.wheelhorseforum.com%2Ftopic%2F79038-another-rare-kohler-k121%2F&usg=AOvVaw3L_Nq-walWPC9kUhi10DF7 A common Kohler 8hp would be a K181. As far as fitment in your tractor, it probably would not take much to fit it in there. I don't think that you would be able to run a mower deck for that tractor with it though. Edited June 12, 2019 by Achto 3 Share this post Link to post Share on other sites
RandyLittrell 3,885 #3 Posted June 12, 2019 And....the 7 HP was a K161. Randy Share this post Link to post Share on other sites
953 nut 56,150 #4 Posted June 12, 2019 Anything smaller than a K-241 will probably require a bit of adapting. any horizontal crank engine that can be fit to the frame will work with a little backyard engineering. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,133 #5 Posted June 13, 2019 8hp likely has a 1" crankshaft and the 12hp a 1-1/8" crankshaft so drive pulley and pto sleeve bearing will be different. Garry 1 Share this post Link to post Share on other sites
kdropper1322@aol.com 2 #6 Posted June 13, 2019 (edited) i believe it to be the 8hp K181 then just need something to get me through the summer mowing season thanks for all the info guys and it's great to have a site where i can lean on the SME's for something like this. I will need to post some pictures as well while i go through the process Edited June 13, 2019 by kdropper1322@aol.com 1 Share this post Link to post Share on other sites
Pullstart 63,201 #7 Posted June 16, 2019 What size deck are you looking to run with the 8 horse? There was a C-81 8 horse version of your C-121... so it’s been done from the factory. If you’re cutting with a 32” deck, you shouldn’t have any worry. to !! 1 Share this post Link to post Share on other sites
kdropper1322@aol.com 2 #8 Posted July 8, 2019 So update I have everything together and started re going through everything and noticed oil leaking out from behind the fuel pump on the K181 motor anybody know where I can find the gasket for that Share this post Link to post Share on other sites
pfrederi 17,970 #9 Posted July 8, 2019 Is yours an original metal pump or a later plastic replacement. If metal there are two types a pulse pump and a cam shaft operated version. What is the spec Number of your motor Share this post Link to post Share on other sites
kdropper1322@aol.com 2 #10 Posted July 8, 2019 Original metal cam shaft pump Share this post Link to post Share on other sites
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