25mm Spline Installation Tool for the main drive. Can be used on Yamaha and Kawasaki model dual impellers. For the Yamaha’s, this tool can be used on both the main drive and inducer. For the Kawasaki’s, it is only for the main drive.
The below picture reflects the new current installation tool to the left and the old version on the right. If your dual impeller was made in 2014 or later, it will use the old installation tool.