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05-22-2023, 05:14 PM
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#1
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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Changing shaft log o
I am in the process of changing the Shaft log on my thirty four marine trader Has anybody ever done This job. Was wondering how they got it done.
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05-22-2023, 06:16 PM
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#2
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 19,154
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There are a bunch of different types of shaft logs. Can you post some photos of your shaft log? We can give more informed advice if we know exactly which one you have.
__________________
Boat Nut:
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05-22-2023, 06:51 PM
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#3
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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It is buried in the keel not gonna get a picture of it.
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05-22-2023, 07:01 PM
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#4
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 19,154
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How will you work on it? Are you changing the whole shaft logor just replacing the packing?
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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05-22-2023, 07:02 PM
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#5
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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The whole shift log.
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05-22-2023, 07:11 PM
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#6
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 19,154
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Ok, then you will need to know the shaft diameter and the diameter of the stern tube in order to buy the log. Then it is pretty easy if you can get to it. Uncouple the transmission from the prop shaft and remove the coupler from the shaft. Loosen the shaft log at the forward and rear ends. Slide the prop shaft to the stern enough to get the old shaft log off the shaft. Then break the old log loose from the stern tube and slide it off the front of the prop shaft. Then do the reverse to install the new one. After it is done I would check the engine alignment. I may have left out some minor details but this is the general process.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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05-22-2023, 07:19 PM
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#7
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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Oops sorry about that I mean the Stern tube we have to change the Stern tube large project. Just wondering if anybody else has done it?
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05-22-2023, 07:20 PM
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#8
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 19,154
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Yes, that is a huge job. Fortunately I have never had to do that on any of my boats.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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05-22-2023, 08:07 PM
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#9
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 26,881
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Quote:
Originally Posted by Dom61
Oops sorry about that I mean the Stern tube we have to change the Stern tube large project. Just wondering if anybody else has done it?
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No, I decided not to do it as I researched for about 6 months and called at least a dozen yards known to do it who all recommended don't bother.
Some of the jobs went easy and most were very difficult.
A few have posted here that they did it, one showing major cutouts of the hull alongside the shaft log and major jackhammering the concrete fuller out of the keel from the inside of the boat.
Some have experimented with liners and coating the old one with an epoxy filler/surface. Never say any good results over the long term....not that they were failures, just not enough data.
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05-22-2023, 08:47 PM
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#10
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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Problem is are you the do it or sync it's leaking that bad?
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05-23-2023, 06:03 AM
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#11
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 26,881
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I completely ground off the bottom of my boat, replaced a 6 foot by 4 foot by 1/2 inch deep section of bad glass, ground through a crack at the bottom of the keel and opened up a 3 foot long hole to let the water out and dry (then repared)....and finally covered the bottom with glass cloth and Interlux Interprotect 2000......pretty much rebuilt the entire boat from keel up (all by myself)
In my Avatar I list my old boat as an Albin 40/PSN. The new owner nickednamed it just a PSN 40 since he knows how different she is from a factory one.
I still thought the work versus gain for fixing the shaft log just wasn't worth it.
Why do you feel the need to? Just because it may be leaking into the keel?
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05-23-2023, 08:31 AM
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#12
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Guru
City: Vermont
Vessel Name: Luna C.
Vessel Model: 1977 Marine Trader 34DC
Join Date: Sep 2020
Posts: 1,177
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What is leaking and why do you want to replace? I am curious because I have the same boat and am contemplating this project, but it is not a priority yet and I am not sure I want to.
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05-23-2023, 04:08 PM
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#13
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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It's leaking into the bildge really bad like sinking bad
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05-23-2023, 04:09 PM
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#14
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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We were sinking
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05-23-2023, 04:57 PM
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#15
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Guru
City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
Posts: 26,881
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You should be able to seal the bilge from the keel cavity...can you detect where the water is coming in?
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05-23-2023, 05:28 PM
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#16
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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Yes but 1975 mt34 has a false floor
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05-23-2023, 05:42 PM
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#17
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Guru
City: Vermont
Vessel Name: Luna C.
Vessel Model: 1977 Marine Trader 34DC
Join Date: Sep 2020
Posts: 1,177
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If you can find where it is coming you may be able to seal with toilet wax ring to prevent sinking.
I had a little water seeping in where my water lift muffler was mounted.
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05-23-2023, 05:49 PM
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#18
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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It took two gulch pumps running continuously and one every now and then to keep us afloat when this happened it's really bad
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05-23-2023, 05:56 PM
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#19
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Guru
City: Vermont
Vessel Name: Luna C.
Vessel Model: 1977 Marine Trader 34DC
Join Date: Sep 2020
Posts: 1,177
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I had to do some bilge floor repair when we bought ours. The bilge floor directly under the forward hatch had broken fiberglass and the concrete was exposed. I can understand how a really bad tube could flood the boat. I talked to another person that had the exact same experience you did including near sinking.
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05-23-2023, 05:59 PM
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#20
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Veteran Member
City: Grand Island NY
Vessel Name: Brandi Jo
Vessel Model: 1975 Marine Trader 34
Join Date: Aug 2010
Posts: 91
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It was close but we had 4 bildge pumps running pumped it. All out got under control and got towboat to give us a tow . We weren't sure what was wrong so I didn't want to take a chance on driving
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