87701-ZZ5-D00 Fast Idle Mark - Overview. The 87701-ZZ5-D00 Fast Idle Mark is a crucial identification component within Honda marine engine systems. It supports the fast idle function system that ensures the engine maintains the correct idle speed for smooth operation during specific conditions such as warm-up or engine load adjustments. As a genuine Honda OEM part, this mark is designed to factory specifications to guarantee seamless integration with existing hardware and controls, maintaining o