1B4115 Push/Choke Key (1B) - Overview. The 1B4115 Push/Choke Key (1B) is a critical control component supporting the throttle and choke system of Honda marine engine systems. It functions as a combined lever that allows the operator to adjust engine speed and prime the engine for easier starting. Designed as a genuine OEM part, the 1B4115 Push/Choke Key ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Combination of throttle and cho