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Help crank question k241
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I'm doing an engine swap on my '64 Cub 100. Both motors are K241 10hp Kohlers but upon swapping the good parts to the new engine, I noticed the way the flywheel screen/drive coupler attaches to the crank are different. The original attaches via a bolt in the center of the crankshaft and the new engine has a threaded crank on the outside only. What should I do??
Attachment 96898 Attachment 96899 Attachment 96900 |
You will need the correct drive cup for that application.
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The bolt hole in the drive cup is smaller.
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If you have the one from the other engine and the hole is the same size as the bolt then use it.
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Try talking to Mid West Super Cub (https://mwsc.co/ ). They have an adapter that should fix your problem.
link to there catalog: https://cdn.shopify.com/s/files/1/18...72684240155565 Go to page 14-right side-item 51168 SW. The Magnum crank has a bolt on the crank end to hold the hub on. I have repaired a few cranks that broke the threaded end off by drilling a hole, threading it and used a bolt. My guess is either you have a magnum crank or the threaded end was broken off. |
not just the Magnum cranks had the bolt, many K series did too before Magnums came out/
and as a side note, back before Kohler screwed up their corporate website, I went on their parts section ("many times") and at one time, I was looking at many of the cranks they listed, was doing a similar "build 1 good engine outta 2" thing, and believe it or not there are many Ks and Magnums that actually took the same part number of a crank as each other. The nut or bolt flywheel retainer setup is NOT A "K series crank" vs a Magnum series crank" sort of thing..... I work on a lot more K's than Magnums and on most, I don't have to go "that" deep into to get running, it seems I see more K's with the bolt than I do with the big nut holding the flywheel in place. |
the new cranks have had the bolt for about 20 yrs. and they come with the bolt ,thick flat washer, lock washer and a bushing to fill the 5/8" hole so the 3/8" bolt fits good
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Does anyone happen to have a diagram of the parts required mentioned above? I’ve encountered a similar issue on a k301 I bought to replace a 241 .
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