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 > mailto: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 mailto: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
