Tohastu 20hp Gear lube incident and oil leak

[baotingshallow]

I have a 20hp Tohatsu 4-stroke and recently had an issue with an oil slick when launching the boat. I discovered fuel was getting into the oil, so after some research, I replaced the fuel pump and installed a new O-ring. I noticed the fuel bulb could now get fully hard, which it hadn’t before. I started an oil change with a new filter, ran the engine on muffs, let it settle, and went to top it off. By mistake, I grabbed gear lube and poured in a decent amount, then ran the engine again before realizing the error. I immediately drained it, put in new oil, but didn’t change the filter because I didn’t have a spare. When I ran it again, the water was extremely hot and the engine was overheating. I’m letting it drain overnight and plan to add new oil and a filter tomorrow. Also I’m not sure the fuel pump was even the problem, as I saw a small amount of oil coming out the bottom while running it on the muffs.