Small Engines (Lawn Mowers, etc.): chainsaw, fuel tank cap, ring gasket

Question
I have a 16" Craftsman chain saw, that starts OK, but runs about 30-45 sec then dies. Tried about every thing I can from the manual. Any ideas?? Thanks

Answer
ricky

Possible causes:

  1. Fuel tank is empty or shutoff valve is closed, or fuel line or fuel tank cap vent is clogged.
  2. Carburetor is over choked.
  3. Carburetor is improperly adjusted or needs service.
  4.Carburetor is dirty.
  5.Air leak in carburetor or intake manifold (e.g., bad O-ring, gasket, primer).