Bought a Honda between March & December last year? You need to look at;
http://hondampe.com.au/repository/power_equipment/Web-notice_HRU-Lawnmower-problem.pdf

In the words of a poster from another forum ....
"I thought this recall was to fix the underpowered engine, slow gearbox, and the small discharge chute but its only because the blades fall off."

I'm beginning to think that Hondas are a bit over-rated laugh

Light travels faster than sound:
This is why some people appear to be bright, until you hear them speak!