91546-SP0-A01 Clamp (18.5MM) - Overview. The 91546-SP0-A01 Clamp (18.5MM) is a crucial component designed for use in Honda marine engine systems. It functions primarily as a securing device that supports fuel and other essential marine system connections. This clamp ensures tight fastening of hoses or cables with an 18.5mm diameter, maintaining system integrity and preventing leaks or disconnections. Manufactured to conform to Honda's precise factory specifications, it guarantees seamless integr