PSS Shaft Seals

[Patriot]

I'm planning on installing PSS Shaft Seals in my boat this fall or in the spring.

I see in the picture, there is a vent tube? I was under the impression that water hooks to this. Not sure

Can anyone explain

 

 

[G-Daddy]

You will tap off the heat exchanger or exhaust manifold to get water to lubricate the shaft seal.  The water goes into the barbed fitting.  The seal is made so that it is not supposed to drip, hence the name dripless seal.  The seal on my boat is called a Norscott and it uses transmission fluid as a lubricant.  In the three seasons since I changed the seals, I have not noticed the bottle of fluid going down any.