This is a Murray walk behind with a B&S engine. It has vibrated bolts out of the housing and even the gas tank bolt. All bolts have been replaced and tightened securely. It takes me 10 minutes to shake the shakes!
Thanks

Bent blade, out of balance blade, bent crankshaft....

get another person and take the blade off and have the other person roll the motor over slowly, and look to see if you see the crankshaft wobbles at all