Have a HRR 21677VKA Honda push mower. Going to take the blades off and either try to sharpen them or take to dealer. Never tried to sharpen double blades before. Any hints? Thanks.
There are some aftermarket sharpeners just for mower blades. Some are "manual" and others attach to a power drill or Dremel tool. You can use a hand file as well.
Don't sharpen to a razor edge; doing so will just wear the edge faster. Insert a screwdriver through the the hole in the middle of the blade to check the balance. Remove material from the heavy side first.
Regardless, be sure to follow some basic safety rules:
* Always wear heavy gloves when working near the blades.
* Block the blades with a large 2 x 4 or other block of wood before trying to loosen/install the blade bolts
* Only use the bolts and washers that came with the mower; they are engineered to work with the mower, so don't substitute.
* When tightening the blade bolts, use a torque wrench to get the bolts tightened
exactly.