I have a B&S engine, 12H802-2640-B1 engine on a push mower that will start up when cold, run until it warms up, then starts to surge, and quits as if it is fuel starvation.
I've cleaned and overhauled the carb, replaced the air filter, replaced the fuel line, drained the fuel tank and refilled with new gas. I do get spark when the engine dies. (I can get it running again briefly with spraying starting fluid in the spark plug hole.)
I've also tried loosening and removing the gas cap to eliminate that as a problem.
I've cleaned and overhauled the carb, replaced the air filter, replaced the fuel line, drained the fuel tank and refilled with new gas. I do get spark when the engine dies. (I can get it running again briefly with spraying starting fluid in the spark plug hole.)
I've also tried loosening and removing the gas cap to eliminate that as a problem.