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asked Dec 09 '11 at 14:11

tigersblood99's gravatar image

tigersblood99
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There are several steps to manually sharpening a lawnmower blade:

  • Remove the blade.
  • Work safely and keep all your fingers - disconnect the spark plug wire to make sure the engine does not accidentally start.
  • Spray some WD40 on the blade bolt and give the penetrating oil a few minutes to work its way into the threads. Then mark the bottom of the blade with a Sharpie to help you re-install it properly.
  • Inspect the blade after you remove it. Cracked or bent blades need to be replaced.
  • Cleaning grass build up around the center bolt hole of the blade will guarantee a tight fit when you remount the blade.
  • Clamp the blade into a vice.
  • Sharpen the blade with a bench grinder, hand-held grinder or flat file. Be sure to follow the factory bevel. Keep a bucket of water on hand and cool the blade by dipping it in water frequently. (If you sharpen your lawn mower blades every couple of weeks, you can simply run a metal file along the cutting edge - file toward the sharp edge of the blade while maintaining the correct angle. Use the file on flat side to knock off any burs left by sharpening.)
  • When sharpening, try to take an equal amount of metal from both ends of the blade to keep it in balance. A balanced blade will let your mower run more smoothly.
  • Re-install the blade carefully. If you marked the bottom of the blade you should have no problem installing correctly.
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answered Dec 29 '11 at 07:09

Germanaz's gravatar image

Germanaz
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Asked: Dec 09 '11 at 14:11

Seen: 418 times

Last updated: Dec 29 '11 at 07:09


 
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