If you don't drill the back holes, you'll have no support for the back part of the mount. You may have to re position the motor.
Type: Posts; User: Jonestrollingmotor
If you don't drill the back holes, you'll have no support for the back part of the mount. You may have to re position the motor.
The 6 bolt mount will give you better support and less stress (doesn't allow the base to twist as much) on the deck of the boat.