The tube is supposed to vent accumulated gasses to the intake. Usually exhaust gas blow by the rings. Some oil carry over is normal and a brillow paf style if separator can usually be found at the valve cover where the tube attaches. Excessive blow by is indicative of stuck, worn, or broken rings or other internal problems.
I have no idea what the PO's maintenance practices were or what oil he used. What I do know is that I got stuck rings the very first season I owned the boat. I successfully unstuck them but had a similarly wet air filter as you described. I installed a blow by canaster to monitor and catch the oil instead of soaking the air filter. It allows me to monitor the amount of blow by oil too. I've been using Amsoil diesel oil since and in recent years have noticed a considerable decrease in the amount of oil accumulated. You can see the canister in this video. https://youtu.be/H-GI38vE4hQ And you can buy one here. https://www.amazon.com/dp/B01JQAJY9W/ref=cm_sw_r_cp_apa_4Qw3AbJ0ZVY8W Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Sun, Apr 22, 2018, 10:24 PM David Knecht via CnC-List < cnc-list@cnc-list.com> wrote: > I removed the air filter holder from my engine today to check on whether > it needed cleaning and was surprised to find the filter soaked in oil and a > significant amount of oil inside the housing. I found there was a > tygon/rubber tube running from a fitting on the top of the engine that > ended just above the air filter housing and had dripped oil such that it > then ran into the case. > > 1. What is this tube and what it is connected to? I can’t find it in my > Universal manual. Oil pressure relief? If so, why would oil be coming out > of it? I had not noticed the engine oil being low, so I don’t think it is > always leaking, but not sure. > 2. Where should the tube go? It seems like it will create a mess > whereever it goes but I presume it is supposed to drain into the the space > below the engine, but it is too short to do that effectively. Dave > > Aries > 1990 C&C 34+ > New London, CT > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
