I'm trying to remove a teleflex steering nut from the pivot tube on an outboard. Instead of the nut unscrewing from the tube, the tube just turns. Do I need to just tighten the lock nuts super tight? I could also put some vice grips on the tube between the mounts, but would hate to distort the tube. The motor is a evinrude 25. Sorry if this has been addressed, but couldn't find anything on a search. BTW, zero signs of corosion and the steering shaft moves freely. In this case some corosion would probably help matters.