Interesting discussion. I have the old school packing, which seemed fine after we bought her and launched in June. But I do see a fair amount of salt crystals behind the engine, so I now wonder how much it drips. Access is pretty tight, but I will try to have a look next time we're motoring for a while.
-- Shawn Wright shawngwri...@gmail.com S/V Callisto, 1974 C&C 35 https://www.facebook.com/SVCallisto On Wed, Dec 11, 2019 at 3:35 PM CHARLES SCHEAFFER via CnC-List < cnc-list@cnc-list.com> wrote: > FWIW, I think the dripless seals are overrated. I've had my boat 18 years > with the packing from the previous owner and I've never tightened the > packing gland. After a relaunch, a Yanmar engine mechanic cautioned me > from tightening the packing nut for three days after a launch. He said > wait three days for the boat to return to floating geometry and it worked. > It leaks for a few days after launch and then returns to spec, dripping > slightly during run and no drip when shaft is still. Since I haven't > taken it apart I can't say what it is, but as an HVAC mechanic who worked > on many large pumps with carbon ring seals w SS springs, leaks were usually > caused when carbon rings cracked. Carbon is brittle and they were either > tight or leaking and didn't allow you to tighten the gland nut like old > style packing. > > If I ever replace the packing on my boat it will probably be with the > synthetic stuff that still allows me to tighten the packing nut. > > Chuck > > > > On December 11, 2019 at 11:11 AM Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: e > Yep vented. > > The PYI and Lasdrop seals rated the highest in a practical sailor review. > The lasdrop gen 2 has the ability to store a spare seal on the shaft and > the rated service life is 8 to 10 years. > > I'm leaning towards the Lasdrop Gen 2 for my installation though I'm > tempted to keep the PYI. The new bellows kit is 1/3 of the price of the > new lasdrop seal. > > https://www.practical-sailor.com/issues/26_22/features/4431-1.html > > I'm also considering a new auto prop instead of paying to get my max-prop > rebuilt. > > Josh > > On Wed, Dec 11, 2019, 10:56 AM Ken Heaton < kenhea...@gmail.com> wrote: > > Is yours vented? The vent was added some years ago. With it you never > need to burp the seal. We don't have the vent so occasionally we do have > to burp it. If I ever replace it I will put the same dripless, but with > the vent. > > Ken H. > > On Tue, 10 Dec 2019 at 13:48, Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > > Alright folks, > > I'm looking for thoughts on a replacement for my PYI dripless shaft seal. > It has worked fine and I'm not afraid to stick with it but I'm looking for > possible options or improvements. > > I've heard of Tides Marine making one and Sailor Sam's sells 4 different > designs by the name Last Drop. > > I'll be pulling and truing the shaft, rebuilding the prop, replacing the > cutlass bearing, replacing the seal. Anything else I'm forgetting while I > have it apart? > > > 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 > > > > _______________________________________________ > > 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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