14781-PJ7-003 Valve Cotter - Overview. The 14781-PJ7-003 Valve Cotter is a vital small component in Honda marine engine systems. This split pin secures the valve stem firmly to the rocker arm, preventing dislodgement during engine operation and ensuring reliable valve function. Designed to maintain seamless integration with existing parts, it supports the mechanical system responsible for regulating valve motion in the engine, maintaining optimal performance and durability.. Key Features. Precis