Re: PTT and transom clamps
I assume your thread relates to the motor's attachment method.
There is no problem using transom clamps, if used correctly.
They need to be lighly oiled and free turning to begin with. (remove engine / heat threaded aluminum section while running bolt section back and forth with oil)
Tighten with appropriate wrench like a 1/2" air impact or carefully placed cheater lever on the old thumbscrew types.
Most all attachment options have lower holes for bolts, and those are very important. To keep the motor from kicking sideways and right off the boat under a full power powerturn.