I have a locked up Kawasaki FC420V motor on my 36" Scag WB. I have been told that I could buy a Kohler CV15 that would replace it and be a direct bolt on with no modifications. How true is that? I am not a gear head, so any suggestions would be welcomed. I would like to replace it with the Kawasaki, but it is a few hundred dollars more than the Kohler. So if the Kohler would fit just fine, and it has a little more HP, then I am all for it.