I past the 100 hr mark (115 to be exact). Today the main belt came off and tied up around the clutch. It cause the motor to shut off immediately. I couldn't get it to come loose and had to resort to cutting it out. Ouch. The new one cost $75. The mower itself has been great. I ran the ultra vac for the 1st 80 hours and never had one problem out of it. Still has the factory belt. I have now put the mulching kit on and it does awesome in bermuda and zoysia. It does ok in fescue but not awesome. I will probably buy kohlers next time or diesels. Kawasakis customer service sucks.