50514-ZW9-A30 Reverse Lock Spring - Overview. The 50514-ZW9-A30 Reverse Lock Spring is a crucial part of the Honda marine engine system, designed to support the shifting mechanism that controls the reverse gear. Its primary role is to provide the necessary spring tension to engage and disengage the reverse lock smoothly, ensuring reliable operation and enhancing overall system functionality. Precision engineered, this spring seamlessly integrates with the existing rigging and reverse lock hardwa