OK, the verdict is in. After a little experimentation I noticed no difference between cutting standard length grass of various types with new blades, good sharpened blades and finally blunt blades.
Where I noticed a difference was in mowing down hedge trimmings. The new and sharpened blades worked equally well, where the blunt blades were not as effective. The new blade's quality in cutting lasted longer than the sharpened blade
A new blade has two 90 degree edges very close together (top and bottom of the cutting side). A sharpened blade only has one sharp edge.
Maybe if there is a way to sharpen the blades so that it has two edges on the cutting side, like a new blade it would be best. You're nto aiming for a knife styled edge. Rather, a rectangular edge with two keen 90 degree edges close together.
Now, back to that stubborn trimmer that dies when revved.............
gcv
