If your Boat has this type of Dash, then this mount will fit.
Please measure your dash insert size for correct fit.
The 1 1/2" spacer is required for Solix 15 console mounts for the 621FS.
All others are optional for the 1 1/2" steering spacer.
Spacer can be purchased here - 1-1/2" Steering Wheel Spacer