I'm just wondering what is the average price to have a Kohler engine replaced. Say 25-27 hp. After 2000+ hrs or when they finallly give out is it usually worth replacing? No I don't need one but I would still like some input. Reason being is it worth buying a water cooled engine over an air cooled. Is it cheaper to just put another Kohler engine on instead of payin more for say a 27 or 29 wc Kawasaki for instance. Or are the mowers pretty well worn out by the time you wear out a Kohler (which I suspect will run 2500 hrs)?