13621-ZY3-C01 T/B Drive Pulley - Overview. The 13621-ZY3-C01 T/B Drive Pulley is an essential component in Honda marine engine systems. This pulley functions within the timing belt system, which synchronizes the engine valves to optimize operation. Engineered specifically for Honda marine applications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM genuine timing belt drive pulley designed for Honda marine engines.. Facilitates precise timing belt movement, maintaining valve timing accuracy.. Constructed to meet factory specifications, ensuring exact dimensions and tolerances.. Seamless compatibility with Honda marine engine hardware, seals, and housings.. Improves engine synchronization for smooth and reliable operation.. Critical for maintaining the longevity and performance of the timing system.. Why Choose Genuine OEM. Using original Honda parts like the 13621-ZY3-C01 T/B Drive Pulley preserves the integrity o