You could try The Old Lawn Mower Club
You probably forgot to put the shear rivets, bolt, key back in depending on the make and model of your lawn mower or you have stripped the bolt.
a gas mower i take it, you can bend the shaft, shear the keyway, and twist the shaft,
Depending on your blade - you probably sheared the shear rivets, bolts or key.
Flywheel key (or shear pin) can shear off which will put the motor out of time and wont start . It could do damage to some other parts but that is the most common.
hurt no, if you pulled your cord and it jerked your arm and hurt you have a shear fly wheel key.
The "timing shear pin" is in the shaft that holds the fly wheel. Hope this helps.
Inside Information - 2006 John Shear A Track Life was released on: USA: 28 August 2011
how to take out rusted sheer pin Penetrating oil.Spray pin wait over night.Punch and hammer. Happy Motoring
Shear Stress divided by the Angle of Shear is equals to Shear Stress divided by Shear Strain which is also equals to a constant value known as the Shear Modulus. Shear Modulus is determined by the material of the object.
The difference between a positive shear and a negative shear is the direction the image is distorted into
As best as I can recall, the propeller used on the 1967 model, 50 hp Mercury, was of a splined design. If there are splines on the engine propshaft, then no shear pin is used.
shear stress (t) is proportional to shear modulus (G) x shear strain (h) or t = Gh where h is shear angle/length