I just measured my Great White and it's 2'7" at it's highest point in
the travel arc.

This large arc seems like will not fit into the relatively small space
below the railing.

Depending on where the rail is, it might clear if you put the motor in
the right angle and position.

If there is not enough space, I may have to get rid of the railing. Or
I may need to replace it with railing that is sticking out away from
the gunwhale. Hopefully, this will allow a lot more room for the arc.

Jay Chan