i repaced my oem mulching 21 inch blade with a gator blade. i would estimate that the gator blade is twice the weight of my original mulching blade.this extra weight seems to unload my mower engine when running. (extra rotating mass). the gator blade mulches great but seems to leave a un cut strip.lawn does not look nice and trim after mowing. i am not really happy with the gator blade and thinking of going back to the oem blade.any advice would be appreciated.