The bushings and/or the brushes are worn on it.
dying battery, bad ground, starter brushes. take your pick
It turns into a solid because of the loss of kinetic energy. The particles of the substance slow way down and barely move, other than vibrating in place.
Check your belts they might be too short or your blades are stuck in gear or your starter might be faulty.
Yes
replace the starter
Weak battery, starter solenoid, or starter.
Eventually slow running turns into walking. All animals can do that.
Usually when hot? Could be a starter going bad
Take him slow and really concentrate on his turns. Don't worry about speed,
A slow crank or excessive power draw. Make sure that your battery is in good condition before condemning your starter.
My 2000 GMC Jimmy is slow cranking. The battery voltage meter is showing charged so I am assuming that the starter is the problem. Where do I find the starter to remove it?
One sound is what is called starter drag, slow turning sound, like Grrr Grrr Grrr