Yamaha Lower Unit Assembly - F9.9 - 6G9-45300-17-4D - See Description for Applicable Models Yamaha-F90-2006 the whole boat feels tighter

the whole boat feels tighter and more controlled

The Quicksilver 8M2003959 Exhaust Oxygen Sensor is one of those unassuming pieces that gives you confidence every time you push the throttle forward

Purpose: Prevents galvanic corrosion in freshwater by protecting gearcase and drive components

Plug it in and route it like any other harness—no rewiring needed

Yamaha Lower Unit Assembly - F9.9 - 6G9-45300-17-4D - See Description for Applicable Models Yamaha-F90-2006 the whole boat feels tighterYamaha Lower Unit Assembly F9. 9 6G9 45300 17 4D is an essential component designed for optimal performance and reliability. This lower unit assembly is engineered to meet the highest standards of Yamaha's marine propulsion systems, ensuring your outboard motor operates smoothly and efficiently. Built with precision, it offers durability and longevity, making it a dependable choice for marine enthusiasts. The Yamaha Lower Unit Assembly F9. 9 6G9 45300