You probably have a bad bearing.
Check the air filter, fuel filter. Either of these easily blocks on mower.
Sounds like the engine heats and the ignition fails.
Fuel tank cap vent is plugged.
the car battery. the alternator while running
Depending on the mower some have belt driven generator . But most have a alternator under the fly wheel . It might also be a faulty rectifier. Hope this helps.
No. The spark plugs are responsible for igniting the fuel in the cylinders. If you start yanking them out, the engine is going to stop running. This is covered in the book Things That Dummies Do.
Something is out of balance. The most common cause is blades that have been sharpened incorrectly.
One can do anything that they choose too. But referring to your actual question, if you pull it out it will shut off, wait actually if you pull off the spark plug wire to get to the plug the mower will already be shut off. no spark no fire. No go soldier. Plus if it was possible, you'd probably damage the engine in some way.
yes
It is not totally unusual. It should not happen though. It means that your carburetor is leaking gas through while the mower is not running. It will fill the cylinder and get into the oil. A quick fix is to get an inline gas shutoff valve and just shut off the gas when you are not using the mower. Otherwise you will need to rebuild the carburetor to fix the problem. You will also have to clear out all the gas from the cylinder and if it got into the oil you will need to drain and change the oil.
Yes, but it takes a very, very long time. The charging system on the riding mower is very low amperage. You would do much better charging it with a battery charger.