How do i maintain my lawnmower to stay on? my lawnmower starts but turns off after the primed gas is...

my lawnmower starts but turns off after the primed gas is gone.
how do i grasp it to stay on? what might be wrong? it is a craftsman 550 series 158cc 22in. cut. the lawnmower is only nearly 7 mo. old. i replaced the sparkplug but still it won't stay on. please relieve!!!!!!
My alien fig tree is going pale?
Answers:    If you only hold had it for 7 months, help yourself to it back to Sears and enjoy them fix it under warranty. That is section of why there is such a article as a warranty.
My jack *** neighbor feed the bear and...
UR running out of gas. Clean the carb.