I always sharpen my blades, usually with a angle grinder, just lift the front of the mower up , gotta watch 4 strokes so oil doesn't spill.
I gives a better cleaner cut, specially for thick grass.
I grind the upper part of the blade at 45 degree angle.
cheers
speedy
I can't imagine how you would get it up there. Do you use the power tool upside down?
Another advantage would be slightly less work for the engine, although those scoops on the trailing edge of the blades are the main cause of drag to the motor during the cut.
