Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-09-2014, 15:53   #1
Registered User
 
Clipper4730's Avatar

Join Date: Feb 2010
Location: Keystone CO
Boat: 50 Bene
Posts: 216
Yanmar and dripless shaft seals

Just a quick question. A delivery captain told us that yanmar recommends freewheeling the prop under sail however will the dripless seals get enough water to lubricate and keep them cool?

Thanks in advance
Will
__________________
Clipper4730 is offline   Reply With Quote
Old 06-09-2014, 16:30   #2
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,006
Send a message via Yahoo to roverhi
Re: Yanmar and dripless shaft seals

I know that Yanmar has told people that their transmissions need to freewheel the prop. Have a hard time believing that in the Kanzaki transmissions for their smaller diesels. For one thing, the sounds of the rotating propellor gets really really really old after a few days on a passage. Made it one day out on the sail to Hawaii and then had to put the transmission in reverse. No issues after the sail.

Not sure the dripless seals have the issues with water lubrication as the old packing glands.
__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 06-09-2014, 17:11   #3
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,336
Re: Yanmar and dripless shaft seals

The PSS dripless shaft seal does not need water injection at speeds below 12 kts so it should not be a problem with the prop freewheeling. Not sure about other brands.

Additionally a prop under power will be trying to suck water from the shaft when rotating and this suction is not present when the prop is simply freewheeling thus improving the lubrication when freewheeling.

Mine has never been an issue.
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is online now   Reply With Quote
Reply

Tags
seals, shaft seal, yanmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dripless shaft seals iwindance Monohull Sailboats 8 23-05-2014 17:55
Help identifying dripless seal and shaft size GILow Propellers & Drive Systems 12 17-10-2013 20:19
shaft seals, lip seals,..oh my sailorboy1 Propellers & Drive Systems 50 04-03-2013 19:50
EPDM Lewmar port seals (replacement) for leaking seals Panamajames Construction, Maintenance & Refit 3 05-03-2012 13:47
Thrust Bearings and Dripless Shaft Seal Matt sachs Propellers & Drive Systems 7 24-09-2011 04:24



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 23:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.