28414-ZW9-650 Starter Case B - Overview. The 28414-ZW9-650 Starter Case B is an essential component of Honda marine engine systems. This starter case plays a crucial role in enclosing and protecting the starter motor's internal parts, facilitating its connection to the engine, and ensuring reliable engine start-up. Engineered to match factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM Start