Guys, what kind of life expectancy are you getting out of your 20 hp Kohler engines? Cutters in my area are reporting an avg. of 900 hrs w/average maint. I got mine to almost 1300 hrs. I like the mower but the the engine life seems too short. Is there just too much heat in the engine compartment of the Walker? Is there a better engine to order for a Walker? How bout a Kubota? I also like to run the 62" deck with the mulch kit, is that deck too stressful on a 20hp engine?