Small Engines (Lawn Mowers, etc.): Mower problems, sears craftsman, fuel tank cap

Question
I have a Sears Craftsman Electric Start, 6.25 HP, Eager-1,Model#917.377351, Serial #05279M010177. My problem is the Mower will Start but only runs a few seconds then dies.

Answer
Jack

Here is what may be wrong

Problem: Engine starts easily but dies after a few seconds.
Possible causes:

Fuel tank is empty or shutoff valve is closed, or fuel line or fuel tank cap vent is clogged.
Carburetor is overchoked.
Carburetor is improperly adjusted or needs service.