Hello, Since I change old crack gas tank few week ago; after cutting approx. 10-20 minutes Motor going to cutoff, but I disengage the cutting blade motor still running no power. After it's cool off about 30 minutes, starts again ok to operate and cut approx. the same 10 minutes problem occur again. Sofar, I have change gas filter, blades, sparkplug,oil & clean air filter nothing help. If possible please help