Small Engines (Lawn Mowers, etc.): Craftsman getting hot & stops, craftsman model, oil viscosity

Question
Craftsman model # 917.270771 engine model 42707-2631-e1. After cutting grass for a half hr or so, engine quits. Will not start back. Have recently changed starter, fuel filter, plugs, air filter. Still not helping. What are your suggestions? Could this be the condenser? Have changed coil before too. What's left?

Answer
Karl

Possible causes:

  1. Magneto is not timed properly.
  2. Carburetor set too lean.
  3. Air intake or cooling fins are clogged.
  4. Shroud or blower housing missing.
  5. Excessive load.
  6. Insufficient or excessive oil.
  7. Improper oil viscosity (4 stroke) or mixture (2 stroke)
  8. Valve clearance is too small.
  9. Excessive carbon buildup in combustion chamber.