Moisture drain bush for an engine starter motor

Abstract

A moisture drain bush for use in a moisture drain hole in an engine starter motor housing wall comprises a stem having an inner and an outer end and an axial length equal to a housing wall thickness and having an axial groove extending between the inner and the outer ends of the stem. An inner flange has a flat inner surface radially extending from the inner end of the stem and larger than the drain hole is provided. The inner flange also has an inner radial groove connected at its inner end to the inner end of the axial groove in the stem and radially extending therefrom to open at the outer periphery of the inner flange. An outer flange having a flat inner surface radially extends from the outer end of the stem and larger than the drain hole is provided. The outer flange has an outer radial groove extending across the outer flange to open at the outer periphery of the outer flange at substantially diametrically opposite positions, the outer radial groove being connected to the outer end of the axial groove. Thus, when the drain bush is inserted within the drain hole in the motor housing, the axial groove and the inner and the outer radial grooves as well as the drain hole together define a continuous but bent moisture drain path extending through the housing wall and a substantially straight path substantially along the housing wall.