I have ordered a new OEM eaton style trim motor. I was able to get the old one out, with a little tapping it to loosen it and wiggled it on out of the hole. Now i am having issues getting the new one to sit all the way down in the hole. I have tried sitting it down and turning it and it is still about not quite eighth of an inch from sitting all the way in. It just does not seem to want to go all the way down to were it seals in so i can bolt it back on. Is there a special trick to getting these things back in. FYI i have a 175HP 86 yr mercury outboard.