Motor overheating

[OutdoorWilly]

I have a 1967 Merc 200 that hasn't been started in 40 something years, and I replaced the impeller, spark plugs, and a few other stuff. I got it running the other day and it was running fine until the top started smoking white smoke. I took the cover off and the fuel tank had burned through the brown plastic that is inside the cover. It runs just fine for a few minutes, but then starts smoking a little bit in the top. I think it might just be burning off old grease that's been caked up inside for years. I have the correct oil to gas ratio, and seafoam running through it as well. Any idea why the fuel tank is too hot?

[OutdoorWilly]

And by fuel tank I'm referring to the tank inside the motor itself, not the actual fuel can.

[CatFan]

Is it pumping water out the telltale?

[OutdoorWilly]

I can't seem to find where the telltale is located

[strmwalker]

I can't seem to find where the telltale is located

when your motor is running it should have a little stream of water coming out the side of the motor if not it sounds like your impeller in not working correctly!!!!

[OutdoorWilly]

yes but I can't seem to find anywhere where it can come out, unless it is supposed to come out of the exhaust holes

[strmwalker]

maybe this will HELP!!!!!

1967 Mercury 200 (20hp) - YouTube

[OutdoorWilly]

His has a hole for it to pee out of. I have the exact same motor, but the hole is not there. It is very strange.

[strmwalker]

His has a hole for it to pee out of. I have the exact same motor, but the hole is not there. It is very strange.

double check and make sure a mud dobber ain't plugged up the hole!!!!

[OutdoorWilly]

Haha I have checked and checked, cleaned everything I can possibly clean, and still can't find anywhere for the water to come out of. I don't know why I can't find this dadgum hole. The water might have to come out of the exhaust holes, but it doesn't. I don't think I put the impeller in incorrectly, but water is just not getting up there.