34908-KM1-671 Bulb (T6.5) (12V 3W) - Overview. The 34908-KM1-671 Bulb (T6.5) (12V 3W) is a crucial component in Honda marine engine systems, specifically designed to support indicator and speedometer lighting. This bulb plays an essential role in maintaining clear visibility of vital engine data and operational status, ensuring safe and efficient running of your marine equipment. Manufactured to Honda's exact specifications, it ensures seamless integration with existing parts, maintaining optima