91502-ZY6-003 Camshaft Collar - Overview. The 91502-ZY6-003 Camshaft Collar is a critical component within Honda marine engine systems. It is designed to securely hold the camshaft in place, ensuring proper valve timing and operation for efficient engine performance. Serving the camshaft system, this part maintains optimal mechanical motion and alignment, which are essential for reliable engine function. Engineered to match factory specifications and dimensions precisely, the camshaft collar ens