It makes almost no sound at all - apart from maybe a very feint scraping noise.
A warped rotor makes a scraping noise. The rotor will no longer sit flush with the wheel and what ever it rubs against will create a loud metal scraping noise.
Only if it has 8 cylinders, anything less than that just makes it sound like an out of tune lawnmower.
No, usually a scraping sound indicates the starter is dragging and needs to be replaced.
A hand held cheese grater will make a scraping sound when you rub the cheese across it. And you would hear the sound of the motor running with an electric cheese grater.
The scraping of chains
Try turning one on and listening.
i have to say Honda or toro
By shaking, scraping, or striking the instrument itself
The squealing a scraping is most likely the idle pulley. i would replace that and the belt then see what happens
it must be something loose under the body
Hustler 3700