31298-ZV5-013 Brush Spring - Overview. The 31298-ZV5-013 Brush Spring is a small yet vital component within Honda marine engine systems, designed to maintain consistent pressure on the carbon brushes of the engine's starter motor electrical system. By ensuring proper contact, this spring plays a key role in supporting dependable engine starting and electrical performance. Manufactured as a genuine Honda part, it rewards marine enthusiasts who insist on authenticity and reliability.. Key Features