Hy-vent valve and pss

Ok I often wonder about myself - I bought Goodway in 2016 and there was existing mild water damage at the base of the galley cabinet opposite the nav station. I repaired that damage but kept noticing it would re-occur. Could not figure out where water was coming from. Tuesday I’m doing the annual engine/ systems maintenance. I have engine, tranny, behind the sink access , all exposed and open. When I’m done and the engine is bled back to life, I put the tranny in gear and see water squirting from under the sink - going everywhere. I have a pss shaft seal. This has a vent hose leading up to the upper galley cabinet top next to the sink edge. Water is pouring from the top of that hose. Go figure! PYI told me I either needed to extend the hose higher ( no way) or install a hy-vent valve - lets air out and stops the water. Duh! I’ll post pics in a week or so when I get back !

You other f35 P owners - how to you deal with your pss shaft seal venting?

I now have another fun problem of repairing the water damage again!


I don’t have a PSS, but I installed one of these to solve a similar issue. I didn’t like having my shaft seal connected to the raw water discharge from my engine. I initially thought that as long as I elevated and secured the hose well above the waterline I would be all set. However, I didn’t account for one thing: when I put the engine in reverse and back down, the prop wash essentially gives the boat an enema. I couldn’t figure out why my engine room was periodically soaked with salt water. After I figured it out, I ordered one of these things and have had no further issues.

Right! When I put into reverse is when it gushed! Can’t wait to fix this problem……and your engine room is perfect! Super job!

The air in the PSS is an issue when launching and if the boat goes faster than a Freedom should ever go. You can burp it after launching by simply compressing the rubber hose and pulling the seal open. After than you should be fine without a vent. This is per the manufacturer’s tech support (if you ask persistently enough.

At the boat today - two projects - the hy vent and the diesel heater. Hy vent all done and works. Second one the diesel heater became toast. Ordered another one