I have 12v92's TTA at 1,050 hp each. Not sure which model/hp 12v92's you are looking at. I have traditional props so can't speak to the jet drives...
I can start them in winter without heat but don't unless necessary. When I shipped the boat up it was unloaded from Transport ship in February. No...
My 12v92's have the heaters toward the front of the motors. both heaters are inboard side just above the stringer rails. They are about the size...
Suggest you see the replies on the other thread where you posed similar question and have received feedback.
I can only speak to the experience with the 92's in my boat. I've never had a problem reaching 2,350 RPM. Even right before time to MOH I would...