Lawn Mower Troubleshooting: Why is My Lawn Mower Vibrating Excessively? | eReplacementParts.com


“Hey, everyone. Tom here. In this video, we’ll help you troubleshoot
a lawnmower that’s vibrating way more than it should. Problem number one, the blade. Your motor blade can chip or break and become
unbalanced if it strikes rocks, roots or other solid objects. A cracked blade can break off while spinning,
which is very dangerous. If you strike a solid object, make sure to
check for damage and replace a cracked or broken blade. If you recently sharpened your blade and have
since noticed more vibration than usual, you may have thrown it off balance by sharpening
one side of the blade more than another. A quick and simple test of balance is to hang
the blade on a nailer screw in your wall. If the blade is unbalanced, the heavy side
will drop down. Sharpen the heavy side little by little until
the blade sits evenly on the nail. Problem number two, the crankshaft. This is the central component of your mower’s
engine turning the pistons up and down motion into circular motion that drives the blade. If the blade struck a solid object and came
to an abrupt stop, it’s possible the transfer of energy bent the crankshaft enough to cause
vibration. You’ll want to check the crankshaft runout
using a dial indicator to see if there’s any warping. If so, a bent crankshaft is a major repair. If you have the tools and confidence to do
it yourself, you can save quite a bit of money. If that’s beyond your comfort level, you may
want to bring your lawnmower to a repair shop to get a quote. Thanks so much for watching. If you have any questions, leave them for
us in the comments below and don’t forget to subscribe for more useful videos. While you’re at it, visit us at ereplacementparts.com.”

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