A starter assembly has a starter motor with a center casing. A front housing is attached to the center casing and the front housing is adapted to attach the starter assembly to the vehicle. The center casing includes a pilot ring which mates with a groove in the front housing to define a serpentine path between the inside and outside of the starter assembly. The pilot ring is formed at the inside diameter of the center housing to define a dam which prohibits contaminants from entering the center housing.