I have a Skag 48 inch Walkbehind Mower model SWZ. It's a 48 inch Hydro. It has a Kawasaki FH500V engine on it which has been ruined and I need a new engine to replace it. I have looked for the same model engine but they are rather expensive. What I want to know is, which Briggs and Stratton or Kohler engine model would bolt up to and fit my mower? I have searched for the answer and couldn't find it. If anyone could help me with this question I would appreciate it! thanks!