28433-ZL1-003 Ratchet Guide - Overview. The 28433-ZL1-003 Ratchet Guide is a genuine OEM part designed for Honda marine engine systems. It plays a critical role within the starting mechanism system by guiding and securing components involved in the ratcheting action of the starter. Precisely engineered to factory specifications, the ratchet guide ensures reliable and consistent engine starting performance. Manufactured to seamlessly integrate with existing hardware, seals, and housings, it maint