91637-Sf1-003 Cap (090 2P) - Overview. The 91637-SF1-003 Cap (090 2P) is an essential component designed for use within Honda marine engine systems. This cap plays a crucial role in protecting and sealing connections within the electrical wiring harness, specifically within the Honda Active Marine system. By covering two-pin connectors (2P), it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda cap designed to fit pr