That's fair. The dampener has a few advantages besides alignment which I'd like to retain. I have painstakingly aligned the engine so I'm not particularly concerned about alignment.
TBH it looks like the PO may have replaced the log and left it long. I don't know what stock looks like. 4.5 inches is way more than is needed to fit 2 band clamps. Why would it need to be that long? Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Tue, Jun 16, 2020, 22:41 Bruno Lachance <bruno_lacha...@hotmail.com> wrote: > Josh, what about loosing the dampener instead? I know you have it, but > With a good alignment you shouldn't need it. I think I would prefer to keep > the shaft log intact, it also keeps / brings the seal a bit forward. I'm > wondering if it adds some sort of support to the shaft. Few years ago when > I replaced the shaft, coupler, cutlass bearing and the packing gland by a > dripless seal I found the engine needed to be more precisely aligned. > > Food for thoughts. > > Bruno Lachance > Bécassine,33-2 > New-Richmond, Qc > > Envoyé de mon iPad > > Le 16 juin 2020 à 20:38, Josh Muckley via CnC-List <cnc-list@cnc-list.com> > a écrit : > > Thanks Marek, > > I agree with almost all of your assessment. > > The shaft centering issue is not that it moves around or that I have > intent to install it "off center" but rather that it could be exiting the > log not perfectly on center. Without some articulation of the seal it > would require perfect alignment between the strut, the log, and the engine. > > As for the log having room for 2 bands, I have at least 4 inches of > engagement - probably room for 10 to 15 bands or more! And that is what I > am considering reducing. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > > On Tue, Jun 16, 2020, 10:23 Marek Dziedzic via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Josh, >> >> >> >> I am far from being an expert, but… >> >> >> >> - I don’t think there is any issues with having very little of the shaft >> “free”. In my boat I have about 1/4” (free). The issue, in my mind, is not >> how much is left free after the assembly, but rather, how you can assemble >> all pieces together. >> >> >> >> - the shaft log has to be long enough that you can safely put the seal on >> it and secure it with two clamps. You want that seal to be as secure as >> possible. >> >> >> >> - there should not be any “flexing” (sideways) of the seal. The shaft >> should go through the middle of shaft log and should not be moving around. >> >> >> >> I might be trivialising the problem, but.. >> >> >> >> Marek >> >> >> >> 1994 C270 ”Legato” >> >> Ottawa, ON >> >> >> >> >> >> >> >> *From:* CnC-List *On Behalf Of *Josh Muckley via CnC-List >> *Sent:* 16 June, 2020 09:01 >> *To:* C&C List <cnc-list@cnc-list.com> >> *Cc:* Josh Muckley <muckl...@gmail.com> >> *Subject:* Stus-List Shortening the shaft log by cutting >> >> >> >> I've asked a few of you personally so if this is a repeat then please >> disregard. >> >> >> >> I'm in the process of replacing/rebuilding the drive train on my C&C >> 37+. In the process I'm replacing the shaft, shaft coupling, shaft seal >> and strut bearing. >> >> >> >> The old seal was a PSS seal and the old coupling was a standard solid >> coupling. I had had a R&D Marine (PYI) coupling dampener and planned to >> reuse. The new seal is a Last Drop II from Sailor Sam's. The new coupling >> is a split coupling from R&D Marine. The new seal and coupling have added >> length which ultimately leaves only about 1.5 inches of free shaft at most. >> >> >> >> So here comes the question. >> >> >> >> First: Any concerns with only having 1.5 inches of free shaft? I have >> 3. >> >> - getting the coupling dampener installed requires the couplings to be >> separated by not just the thickness of the dampener buy rather by the >> thickness of the coupling bolts. >> >> - getting the split coupling on could be complicated >> >> - with the shaft seal bottomed out on the log there is less articulation >> available in the seal tube. The seal uses a delrin bearing to center >> itself on the shaft but without room to flex the bearing will just ride >> harder on the shaft and can even overheat. >> >> >> >> Second: >> >> The seal engages with the shaft log by at least 4 inches. If I cut the >> log shorter, then I could push the seal deeper onto the log and get a bit >> more free shaft and room for the seal to articulate. Can any of you see >> any drawbacks or pitfalls to cutting the log short? >> >> >> >> >> >> Thanks, >> >> >> >> Josh Muckley >> >> S/V Sea Hawk >> >> 1989 C&C 37+ >> >> Solomons, MD >> _______________________________________________ >> >> 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 > >
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