In the last few years I have owned 3 different models of z's, all with baggers. Toro z500, exmark hp triton, ferris is2000,and toro diesel. I have blown pumps a wheel motors in all these mowers within 100 hours of use. What is causing this phenominom? I read on other sires where other people are having the same problems. My first Z was a toro back in 2000 never blew anything in fact its still running! Are the Z's just made cheaper but costing us more?