What the heck!!!!!! Today my 25/52 super Z exploded (figuratively speaking). It ran well with no problems up until I got to the job site today. Was on the trailer and was trying to start it. It took a unusual long time to start. Once started it ran really rough and displayed tons of white smoke. It ran for about 10-15 seconds and died. did this several times. Oil was leaking from the muffler. I went to the hustler dealer and he thought that I had broken rings or scored the piston walls??? whats the deal - I bought the mower on 070205, it has 451 hours on it. the dealer says that the engine should have lasted 2500 hours or so.