31631-ZZ3-003 Rotor - Overview. The 31631-ZZ3-003 Rotor is a crucial component of the ignition system in Honda marine engine systems. Responsible for generating the electrical energy necessary for ignition, this rotor plays a vital role in ensuring reliable engine start-up and operation. Precision-engineered to Honda factory specifications, it guarantees seamless integration with your existing marine engine parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda m