98056-55757 S/Plg (U16fsr-Ub) - Overview. The 98056-55757 S/PLG (U16FSR-UB) is a genuine Honda spark plug designed for use in Honda marine engine systems. This crucial engine ignition component ensures reliable and efficient combustion, promoting consistent engine performance and optimal power output. Engineered to meet factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM genuine Honda spark plug designed