Ok, I’m posting this here hoping for some honest answers. So I forgot to change my lower unit oil (70’s Johnson 50hp) until now and of course there was a little ice at the bottom. Used my heat gun and 10 seconds later it was flowing out. Continued to heat the unit up and got new oil in there now. My question is what could I have already damaged? Also, how would I know? The motor is old and has problems but like many other old products it still runs great despite its problems. I’m sure I could fix $500 worth of stuff on it but it’s old and runs fine. Just concerned now about this ice at the bottom of the lower unit. Thanks in advance!!!