If your dash looks like this, then this mount will fit.
If you have very large units and it is not listed in the drop down menu for GPS/Sonar, then go to the G3 Sportsman Series MEGA Single Dash Mount
| All G3 Models - G3 changed the steering wheel to a 1 piece Steering Wheel/ Cog. If your boat has Hydraulic Steering, then your steering wheel should measure from the dash to the inside top edge of steering wheel, it should read about 6 3/8 - 6 5/8", If that is the case, then in most cases, all will be good.
If it is 6" or less on that measurement, then you will need a complete changeover kit to be able to add a spacer to increase area between steering wheel and unit. Steering Wheel Changeover Kit can be purchased here.