This is a genuine OEM MerCruiser Quicksilver 84 816761Q17 spark plug ignition set with 9 wires. It is designed for use with inboard engines and components, and is a perfect fit for your boat. The brand is well-known for its high-quality products, and this ignition set is no exception. The manufacturer part number ensures compatibility with your engine, making it a reliable choice for your boating needs.