The Power Valve Actuator designed for the 1999 Yamaha WaveRunner XL1200 Limited is a genuine Yamaha product with the Manufacturer Part Number 66V-85820-00-00. This actuator is essential for controlling the power valves on the Yamaha WaveRunner, ensuring optimal performance and longevity for your watercraft. With no warranty included, it is recommended to follow the manufacturer's guidelines for proper installation and maintenance to guarantee the reliable operation of your Yamaha WaveRunner. Item is from my spare parts bin, I no longer have the boat, so cannot test the item — listed as for parts/not working.