You either have a bad or loose pulley, a stretched belt or a tensioner that isn't working right.
maybe your deck is too low
Depends on the size of the lawn mostly. A push mower (or better yet a powered drive push mower) would have the best control in rough terrain, but if it is a large lawn a riding mower is better.
There is a charging system that is under the flywheel. It is a magnetto system.
Castlegarden
Mower has a generator, which is turned by the engine. When engine is running, generator produces electricity to charge the storage battery.
You may have a hot wire grounding out somewhere
Place mower near street with FREE MOWER sign. That is the best way to remove the clutch/drive on this POS mower.
There is usually a deck belt and a drive belt.
I'm assuming its a riding lawn mower of some type. Our own lawn mowers of this type have an alternator in them that keeps the battery charged
To install the main drive belt on a Murray riding mower, first ensure the mower is turned off and the key is removed for safety. Remove the mower deck by disconnecting the belt and any necessary bolts. Next, route the new drive belt around the engine pulley and axle pulley, following the mower's belt routing diagram, which is usually found on the mower's frame. Finally, reattach the deck and check the tension on the belt before starting the mower.
Can I do it myself, set the timing on my riding mower.
Perhaps it is the starter drive. That happened to my riding mower. Got the drive replaced, works fine.