i have a 2000 15hp johnson weighing around 80lbs, and i am putting it on my 12 foot jon boat, well my problem is one of the clamps that are used to fasten the motor to the transom are frozen and won't move (i tried penetrating oil and also heating it up) well, will it be safe if i fasten the one side down and also bolt it down to the transom with the holes on the mounting bracket. is this safe to do, and also any ideas on getting the stuck clamp out? can i drill it out?