31231-ZZ3-003 Brush Holder Assembly - Overview. The 31231-ZZ3-003 Brush Holder Assembly is an essential part of the Honda marine engine motor starter system. This component is engineered to house and guide the carbon brushes that maintain electrical contact with the motor's armature. Designed to ensure consistent electrical current flow, the brush holder assembly supports the reliable operation of Honda marine outboard engines, contributing to the durability and performance of the electrical mot