This NGK spark plug, model B9HS 5810, is a crucial component for your outboard engine. It is designed for high-speed engines and is made by a trusted brand in the industry. The manufacturer part number for this spark plug is 5810. With its precise ignition, this spark plug ensures that your engine runs smoothly and efficiently. It is easy to install and is a great choice for anyone looking to upgrade their outboard engine. Don't miss out on this opportunity to improve the performance of your boat.