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I am considering repowering my 522xi (for various reasons, but that's not the issue here) and I need the help of some experienced people. Sorry this post is a bit disjointed, I wanted to condense my thoughts without creating a bunch of new topics. I believe that the Kohler CH730 is a near direct fit for the Kohler CH22S that is in the unit, does anyone know this for sure? Best I can tell it is. My first issue is with the PTO shaft. The replacement engine I have a lead on has a (proper diameter) 4" long shaft with a 7/16-20 1.5" deep threaded hole on it, the one that came in the 522xi has a 3-5/32" shaft. I am hoping to run it as is, but it looks like it might come dangerously close to the battery, and I dont know if that 27/32" difference will cause the PTO belts to run all amok. How does the PTO attach to the driveshaft, just bolted straight on? If it is an issue, has anyone cut a crankshaft before? If so, how? Will there be enough threads left for the PTO bolt if I don't have the crankshaft re-drilled and tapped? I called one machine shop that rebuilt my K341 and they said they couldnt do it, but I may check with others. Thanks in advance everyone! I changed the topic title to reflect my project that was based on the original topic.