leaf blower stop after few minutes running fine

See if you have a spark and then clean out the carb make sure you have fuel going to carb. then come back if not working.
 
Check to see if the fuel cap is not venting as well. Loosen it, start it and see if it will run longer than the five minutes. Take a look in the fuel tank while you are at it, makes sure the filter is clear, still connected to the fuel line and the fuel line is not cracked or broken off.
 
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