This rant came from personal experience. Driving a shallow sport with 150 yamaha and baystar installed, went into a sweeping left turn, and it couldn't come out of it. Unit was full and clean, just didn't have the guts to hold that motor.
Now we've rigged quite a few on 115's and three cylinders, nary a problem. Just wouldn't trust it again on a V6
Marble Falls/Seadrift TX