Small Engines (Lawn Mowers, etc.): MTD Quantum 21 Lawn mower Sel Prop 5HP, briggs stratton, throttle linkage

Question
Sir:
   I can start the engine, but as soon as it start going it shuts off. I replace the plug, filter and use carburetor cleaner, but still it will not stay on. Everything else work fine.
      Thank you for what ever you can tell me.

Answer
Purchase a carburetor kit from the manufacturer of the engine it is either Briggs & Stratton or Tecumseh.  Also, purchase new mounting gaskets.  Remove the carburetor and completely disassemble take a wire from a wire tie all air and fuel passages and blow them out with carburetor cleaner or compressed air.  Reassemble the carburetor using the new kit mount the carburetor using the new mounting gaskets.  Attach to choke throttle linkage and you should be good to go.  I hope this information helps.