14781-PRB-A02 Valve Cotter - Overview. The 14781-PRB-A02 Valve Cotter is a crucial component in Honda marine engine systems. This valve keeper pin plays an essential role in securing valve components, ensuring smooth and reliable engine operation. Precisely engineered to maintain tight locking of valve springs, it ensures consistent performance and prevents mechanical failures during marine engine function. Designed to meet exact factory specifications, it ensures seamless integration with exist