My self propelled briggs and stratton mower runs

unbolt top cover 5/16, unbolt bottom cover 3/8 unbolt blade 9/16 or 5/8 remove old belt, install new one, install covers and blade

whats wrong with roller drive give detail

if its a briggs and stratton engine with the plastic carb fixed to top of the fuel tank then you will need to replace the diaphragm and blow out the fuel pick up pipe

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Mowers don't typically take batteries. Possibly riding mowers might, but not push/self propelled mowers. They run off a spark plug and gas and that's it.

The "spring" thermostat is a special spring, its made of special wire and set at a specific spring rate... if its damaged, over heated. by the muffler, etc.. replace it...
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The tempature might be evaporating the fuel, try priming it before starting it again

if you play with it u will void the warrantee. call the dealer u got it from

Troy, Unless you are using old fuel (it breaks down after 1 week) it sounds like you have a faulty spark plug. Replace this first, drain any old fuel and replace with fresh fuel (premium unleaded). A faulty plug will work one minute but then fail like you have described.

when the lawn mower suddenly stop working,first you should check the fuel. i think the Self-propelled device was broken. You can take the Self-propelled device off and try again with it.