Why do Briggs & Stratton engines occasionally squeal when they are started?

The older model Briggs & Stratton engines occasionally have this problem. This problem usually results with the starter rope binding under the pulley inside the starter housing and can render the engine useless until the pull rope is removed and then replaced. Fortunately, this problem is not the result of a housing or pulley malfunction. The problem is only consistent on older models that use a spinnable clutch type assembly. The newer models use a flip pin clutch assembly that has eliminated this problem. The problem is caused by the clutch binding against the shaft as it spins. It can be easily corrected by removing the clutch and cleaning the shaft and the inside of the clutch assembly that rides on the shaft with a piece of steel wool. Once both parts are cleaned then the clutch will spin freely without binding. Also be observant to any noticable burrs on the shaft while cleaning. Any burrs that are noticed should be filed off until the shaft is smooth.  more