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Shaking and vibrating

Had the mower serviced and there were no bent blades or shaft. Any other suggestions?

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  • Craftsman Master
  • 7,482 Answers

You have a bent shaft...time to replace the motor

Posted on Apr 25, 2013

6 Suggested Answers

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Posted on Jan 02, 2017

  • 48 Answers

SOURCE: Mower shakes

sounds like you bent the crank - remove the spark plug , tie the shut off handle closed with a rope , then raise mower up so you can spin the blade . look at the blade bolt while you spin blade . if crank is bent the bolt will seem to wobble

Posted on Oct 17, 2008

  • 279 Answers

SOURCE: Locked up Eager 1 6.75 Craftsman Mower

The timing may be off due to a bent or broken flywheel key. See if you can remove the flywheel and look at the keyway. To remove the flywheel: take a nut with the same size threads as the one that holds the flywheel on. Thread it on but not so far as to let the shaft come through. With your weak hand, lift the flywheel with a little upward pressure. With the strong hand, tap the nut with a wooden mallot if you have one. If you dont, use a hammer. Tap the nut and the flywheel will come off. You may have to tap it sharply. Once you have done that, remove the nut and save it for another day. You will be able to see if that is the problem. Good luck...Lee

Posted on Sep 03, 2009

  • 110 Answers

SOURCE: Bent Shaft???

Check that the blade securing bolt is secure. While you're there, have somone SLOWLY pull the starter rope. It will be obvious if anything is bent to the extent you describe.

If this machine has a blade clutch, engage blades while you do the pull test (DISCONNECT PLUG WIRE!!!!)

Posted on May 09, 2010

hunter19_46m
  • 7482 Answers

SOURCE: Lawn mower sounds like it is running fast and vibrating.

Sounds like a bent shaft, or bent blade.
Also sounds like the part that holds the blade to the shaft is sheared, and allowing the motor to run faster than it would if it is turning the blade properly.
Hope this helped,
Please rate me

Posted on May 26, 2010

Testimonial: "Your response was very helpful. Is there a repair manual or instructions online that I could get to describe the process to repair the mower? Again thanks for your response. "

hunter19_46m
  • 7482 Answers

SOURCE: My wife hit a stump

Hi ptcbob7...
Yes, she bent the crankshaft...very hard to get the bend out, most of the time a new engine is in line.
Being that your going to have to replace the motor anyway...I would take a large hammer and give it a good whack in the opposite direction of the bend, it may not take it all out, but it will take out some of the bend.
Please take time to rate me

Posted on Aug 30, 2011

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Sounds like a bent shaft, or bent blade.
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Hope this helped,
Please rate me

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Bent Shaft???


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If this machine has a blade clutch, engage blades while you do the pull test (DISCONNECT PLUG WIRE!!!!)

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