Has anyone had experience re-powering an older Walker MS36-42? Mine was purchased in 1990. It came with an 11 hp Briggs & Stratton engine. After 28 years the engine came apart internally and now I'm at a point of what to do. The original engine is no longer available and replacement engines with the same or similar dimensions are not to be found; at least that's what I've found so far. I would like to know if anyone has successfully re-powered one of these 11 hp B&S mowers and what were you able to do to accomplish it? Any tips, procedures, etc., that can be shared would be appreciated! The mower (except for the engine) is still in good shape and I really don't want to do away with it if there's a feasible solution to getting another engine to work in it. Thanks!