My 857 had a K271 that had been installed by the PO. The engine threw the rod and damaged the cylinder. I was able to get a new Kohler CH270 for a replacement. I didn't feel at all bad about this as the K271 wasn't original anyway. Here is the problem, the existing holes don't come anywhere close to matchcing up. If all else fails I will make an adapter plate but I figured I had better ask if there is an easier solution, like a premade adapter of some kind?
The holes are 79.99mm (3.149") apart in the width and in the fore/aft they are 162.00mm (6.378")