31105-PZ1-003 Brush Holder Assembly - Overview. The 31105-PZ1-003 Brush Holder Assembly is a crucial component in Honda marine engine systems, specifically supporting the electrical starter system. It ensures efficient electrical current transfer by securely housing and guiding the carbon brushes against the armature of the starter motor. This precise function ensures reliable engine start-up and ongoing performance. Crafted to meet Honda's rigorous factory specifications, the part integrates se