Lawn mower blade sharpening

[DIYspanner]

I've been given two electric rotary lawn mowers to repair/service.

I noticed on both that the cutting blades are sharpened on the lower side. If sharpened on the upper side of the blade, to my way of thinking, would provide a better cut and help lift the cut stems of grass up to the blower and into the collector.

I'm being pedantic I suppose.

 

[Burnerman]

On the lower edge.....are you sure?
All machines I work on are sharpened on the upper edge. I can't comment on yours, but the blade may be on upside down?
Regards
John

 

[endecotp]

Photo please!