Re: Johnson 70 1977 were does the water come out of when running.
Newer motors have what's called a tell tale (or we call them the pee hole). It's a stream of water directed on top of the water so you can see your water pump is working. The majority of the water still exits underwater through the prop. On our older motors all we have is the underwater exit and a little bit of spitting from the exhaust relief holes. If you've just acquired this motor and don't know when it was last done....definitely replace the water pump impeller.