Honda HRU216M1 Owner's Manual & Service Record Booklet page 18

5. PRE-OPERATION CHECKS - continued
5. Inspect the blades for wear and damage.
6. Check that the blade setting bolts and the blade disc holder bolt are tight
(see page 51).
Never operate the mower with a worn, damaged, split or dented blade. A
piece of blade which breaks off and is thrown outwards can cause serious
bodily injuries.
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