I recently purchased my first boat. It has a Merc 120 outboard on it that is 2 stroke. I had a serious brain fart and put 12 gallons of gas only in the tank, no 2 cycle oil mixed in with it. I put the boat in the water and tried to start it a few times. It tried to start but wouldn't turn over all the way. How badly have I damaged my engine? Do I need to do anything with the engine? Can I just pour some 2 cycle engine oil into the tank now and be ok? Sorry for the novice level questions, I just wanna know how badly I screwed up...thanks for the help ahead of time!