bw wrote:
"Tim Zimmerman" wrote in message
. ..

My Black&Decker electric mower was loan to friend. He ran the
mower over several boulders several times, chipping a couple
pearl size sections off the blade. Possibly, this is causing the mover
to vibrate to the point of causing a shoulder sore.

I remove the blade, then clamp it to a vise grip. I have an angle
grinder that I will use to fix the balancing problem. The problem is,
I've never done this before. What is a practical way to balance a
mower blade?


Hate to be the bearer of bad news, but the odds are that the severe
vibration that you are experienceing is not due to an out of ballance
blade. When a mower hits an object like a root, or rock or other
obstruction, it often bends the crankshaft that the blade is attached
to. This happened to my parents Honda mower when my son ran it into a
rock and the repair guy told us that it is a common occurance. In their
case it required a fairly expensive repair, the replacement of the crank
shaft AND a new blade. You can try a new blade, and maybe you will get
lucky, but if he hit rocks numerous times, I expect that the vibration
will still be there with the new blade. They don't make the motors on
mowers with heavy enough parts to be mowing rocks.