Mark, My prop tube is bronze and I haven't done anything to it since installation in 1981 so I can offer no experience with a steel stern tube.
However, I do have a comment about the seawater injection pump. Instead of having a separate pump to worry about, I added a fitting (with a ball valve (I like the Apollo brand)) where the seawater enters the main engine heat exchanger. I feed the shaft log from this point with a piece of garden hose. There is enough backpressure caused by the heat exchanger and all the downstream plumbing to feed a adequate supply of seawater to the shaft log. It might be a good idea to have a fine-meshed strainer or filter there too. I operate in silty water (East Coast ICW) and I have noticed the silt carried through and into my shaft packing has made some shallow grooves in my shaft. Of course, you would have to have a gauge at the filter to show you when it would have to be changed. Norm S/V Bandersnatch Lying Julington Creek FL 30 07.72N 081 38.4W > [Original Message] > From: Mark Andrew <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Date: 2/10/2008 1:32:38 PM > Subject: (T&T: & TWL2:) Prop shaft tube - corrosion > > > I'm also assuming that the plumbing to the shaft tube provided fresh sea > water to the tube so that stagnant water would fester in the deep recess of > the tube. We plan to plumb from the seachest strainer thru a small pump > direct to the prop-shaft tube such that every time the engine is turned on, > the pump will create a small flow into the shaft tube. I figure this was > the original setup. > _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
