17931-ZZ3-A41 Throttle Arm Assembly - Overview. The 17931-ZZ3-A41 Throttle Arm Assembly is a crucial component in Honda marine engine systems. This OEM throttle arm assembly controls the engine's speed by adjusting the throttle position, directly impacting the watercraft's motion and responsiveness. Designed to meet factory specifications, the assembly ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. The throttle arm assembly plays