I have 170 hours on my original Z254F belt. I have seen various suggestions about when to replace the belt. I checked mine as well as I could with the belt installed and don't see or feel any cuts or breaks. Am I lucky or should I replace it now before it breaks under use?
SOP when servicing
put a white dot on the belts
run then through looking for cracks , covers worn through, covers torn or burning
Check the width
No defects leave it there