Sierra's 18-9075 Spacer is designed for use with Mercury 225 EFI (4-Stroke) (s/n 0T653945 & Up) outboards. It is also designed for use with Yamaha 115 HP to 300 HP (2-Stroke) (1993 & Up) and 115 HP to 225 HP (4-Stroke) (2002 & Up) outboards. Includes one spacer per package. It is interchangeable with Mallory 9-43711, Mercury Marine 23-888690, and Yamaha Outboard 61A-45538-00-00. Each Sierra product meets or exceeds the original equipment part it replaces.