My 8 hp murray riding lawn mower Tecumseh motor

Rose Mata sounds like a fuel situation. Could be vapor locked, check the gas cap and see if the vent openings are clean of any debris. Check to make sure that the fuel line is away from the engine block. Clean your fuel tank and any filter. Let us know what you have checked already. See if you can identify an engine number so that we might get you some more specific information on checking the carb. Also, let us know if the mower starts right up again or if you have to wait for a while.