When winterizing I usually disconnect the raw water at the strainer. There is just enough hose length to stuff it into the jug and pull the pink antifreeze through the system until it spits out the exhaust. This past fall it did not spit out the exhaust but instead came flowing out at the prop-shaft. Turns out that my shaft seal is fed raw water, not just vented. I'm inclined to leave it that way after reviewing PSS installation instructions. However, it concerns me that it behaved differently this year, as usually it spits out the exhaust.
Well, it took me until now to finally investigate and I found the raw water is split three ways - to feed the exhaust riser, the PSS, and also all the way to the stern to a nipple on the exhaust outlet, just at the through hull. Why does the raw water feed to the exhaust outlet?
Well, it took me until now to finally investigate and I found the raw water is split three ways - to feed the exhaust riser, the PSS, and also all the way to the stern to a nipple on the exhaust outlet, just at the through hull. Why does the raw water feed to the exhaust outlet?