Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #1  
Old 08-04-2018, 01:48 PM
rkmason rkmason is offline
TT Enthusiast
 
Join Date: Mar 2006
Boat: '98 MariStar 200VRS 350 TBI
Location: Central Texas
Posts: 126
Propshaft Rope Seal - When to Replace?

As the thread title says, when should I replace the rope seal in my propshaft stuffing box? My '98 MariStar 200VRS now has about 550hrs on it. We have owned this boat since late 1999 so I'm certain the rope seal has never been replaced nor the stuffing box gland nut tightened. After a day on the water there is always some water in the bilge, but not what I would call an excessive amount.

Is 20 years / 550hrs runtime a long time for a propshaft rope seal to go without any service? Does everyone just run them until the leakage gets great enough to become an issue, or do you replace the seal after this long no matter what? Will tightening the stuffing box gland nut help at all on a rope seal this old, or do I just need to replace it? Not trying to make work for myself, but I'm starting to wonder about it after this long.
Reply With Quote
  #2  
Old 08-06-2018, 12:29 PM
FrankSchwab FrankSchwab is offline
MC Devotee
 
Join Date: Aug 2004
Boat: 1998 Maristar 200VRS
Location: Phoenix, AZ
Posts: 1,968
The packing generally only needs to be replaced in two situations:
1. You remove the propshaft - you'll damage the packing while removing/reinstalling, so go ahead and replace it.
2. You can't get down to the specified drip rate by tightening the packing nut.

Sounds to me like yours is in great shape, and I wouldn't mess with it. Check the drip rate, and if it's excessive you might want to tighten the nut to bring it into line. But if a day on the water only leads to "some water in the bilge", I'd call that "Adjusted well enough".

/frank
__________________
1998 Maristar 200VRS
Reply With Quote
  #3  
Old 08-19-2018, 10:01 PM
rkmason rkmason is offline
TT Enthusiast
 
Join Date: Mar 2006
Boat: '98 MariStar 200VRS 350 TBI
Location: Central Texas
Posts: 126
Frank, have you tightened the packing nut on your boat stuffing box? Does it take any specialized tools or just two big open end wrenches? The access looks a little difficult down there under the pan.
Reply With Quote
  #4  
Old 08-20-2018, 12:03 PM
FrankSchwab FrankSchwab is offline
MC Devotee
 
Join Date: Aug 2004
Boat: 1998 Maristar 200VRS
Location: Phoenix, AZ
Posts: 1,968
Getting to those nuts is a royal PITA. I tried all kinds of things, but ended up buying:
https://www.amazon.com/gp/product/B006L23738
The packing nut and lock nut are different sizes; I bought a 1-7/8", and a 2" wrench. One of them isn't quite right (I don't remember which), but works just fine. Kinda of expensive for the 10 seconds you'll need them (5 seconds to break the two nuts apart, and 5 seconds to snug them back together), but a lot cheaper than the medical costs of the high blood pressure from an hour of cussing trying to use less appropriate wrenches, or trying to use almost-as-expensive wrenches which claim to be appropriate:https://www.westmarine.com/buy/seafi...wrench--290280
__________________
1998 Maristar 200VRS
Reply With Quote
  #5  
Old 08-20-2018, 10:55 PM
mtajpa's Avatar
mtajpa mtajpa is offline
MC Devotee
 
Join Date: Feb 2009
Boat: MC 1999 Maristar 230 sport
Location: Southwest
Posts: 1,006
Follow Franks instructions. I dreaded this adjustment. Bought the tools took me longer to empty the stuff out of the locker than it did to make the adjustment. I have 750 plus hours and only needed a half turn to get the right drip rate.

By the way Thanks Frank.
__________________
99 MariStar 230 Sport LTR 330
Reply With Quote
  #6  
Old 08-21-2018, 06:24 PM
ValveCoverGasket's Avatar
ValveCoverGasket ValveCoverGasket is offline
TT Enthusiast
 
Join Date: Aug 2016
Boat: '04 X9
Location: pnw
Posts: 338
stupid question, but somewhat related - how much is too much regarding the drip? besides the obvious overwhelming the bilge pump hah
Reply With Quote
  #7  
Old 08-21-2018, 08:24 PM
mtajpa's Avatar
mtajpa mtajpa is offline
MC Devotee
 
Join Date: Feb 2009
Boat: MC 1999 Maristar 230 sport
Location: Southwest
Posts: 1,006
My owners manual states no leakage with engine OFF.
While operating 10-15 drops per minutes is normal.
__________________
99 MariStar 230 Sport LTR 330
Reply With Quote
  #8  
Old 08-22-2018, 12:44 AM
david_ski david_ski is offline
TT Regular
 
Join Date: Jul 2005
Boat: 2003 SN196, PCM 330HP 5.7L, ZeroOff
Location: Auburn, CA
Posts: 99
Quote:
Originally Posted by FrankSchwab View Post
Getting to those nuts is a royal PITA. I tried all kinds of things, but ended up buying:
https://www.amazon.com/gp/product/B006L23738
The packing nut and lock nut are different sizes; I bought a 1-7/8", and a 2" wrench. One of them isn't quite right (I don't remember which), but works just fine. Kinda of expensive for the 10 seconds you'll need them (5 seconds to break the two nuts apart, and 5 seconds to snug them back together), but a lot cheaper than the medical costs of the high blood pressure from an hour of cussing trying to use less appropriate wrenches, or trying to use almost-as-expensive wrenches which claim to be appropriate:https://www.westmarine.com/buy/seafi...wrench--290280
I have the adjustable packing-nut-wrench. I purchased it at a plumbing store for less than the WestMarine price 30 years ago. It is a pain to use. It doesn't stay locked and always seem to be a little too loose. I prefer to use a pair of Channel Lock pliers to break the nuts apart and snug them back together.

After adjusting, I also check to make sure that the packing nut doesn't get HOT after running. After adjusting we ski a set. I will then check the temp of the nut. A little warm is fine, HOT is not. if it feels hot, you have the nut too tight, and it the packing will start to scorch the shaft. The GoreTex packing rope will barely drip at all even when running.

I now have an OJ dripless shaft seal on my boat. No need now for wrenches or Channel Locks.
__________________
Previous: 1993 ProStar 351HO
2003 SN196, PCM 330HP 5.7L, ZeroOff

Last edited by david_ski; 08-22-2018 at 01:11 AM.
Reply With Quote
  #9  
Old 05-18-2019, 10:42 AM
prostar205's Avatar
prostar205 prostar205 is offline
MC Devotee
 
Join Date: Aug 2004
Boat: 2002, X30, L-18
Location: Bothell, WA
Posts: 1,812
Anyone have a good way or advice on how to free up the lock nut on the packing box? My packing nut (the large nut that houses the rope) comes of no problem. The jam nut will not move making the adjustment difficult.

One idea I have is to remove the prop shaft (done this many times), then remove the packing nut, jam nut and the sleeve they ride on from the rubber hose. Once out of the boat, I can get a much better shot at the jam nut and also replace the rope.

I honestly don't know how anyone could replace the rope while that jam nut assembly is in the boat.

Thoughts??
__________________
2002, X30, L-18, Red Metal Flake (the possessed boat)
Reply With Quote
  #10  
Old 05-19-2019, 01:07 AM
FrankSchwab FrankSchwab is offline
MC Devotee
 
Join Date: Aug 2004
Boat: 1998 Maristar 200VRS
Location: Phoenix, AZ
Posts: 1,968
If the lock nut is, well, locked in place, you're gonna have to find a way to grab and hold the packing box, then turn the lock nut. On mine, there's a smooth brass ring around the packing box that's the stop for the rubber hose - it'd probably be a good thing to grab hold of. Use some PB Blaster every day for a couple of days on the nut, then perhaps a pipe wrench or large-jaw Vise Grip (https://www.amazon.com/VISE-GRIP-Ori.../dp/B00004SBB1) on the brass ring to hold the stuffing box, and one of the large crowfoot wrenches that I originally linked to to break the lock nut loose. Well, that's what I'd try anyway...
__________________
1998 Maristar 200VRS
Reply With Quote
Reply

Thread Tools
Display Modes

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


All times are GMT -4. The time now is 12:54 AM.


2018