logo
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
Shaft Isolation
Options View
Previous Topic Next Topic
Capt. Chad
#1 Posted : Friday, August 13, 2010 12:37:03 PM(UTC)
Rank: Dedicated Tin Star

Groups: Member
Joined: 2/22/2010(UTC)
Posts: 78
Points: 155
So... I know the shafts are supposed to be isolated for corrosion protection. Exactly how is this supposed to work. I am replacing a coupler and I had a SS shaft going into a steel coupler bolted to the steel hub on the steel crank. What's missing and where does it go?
1981 32' Sedan Fly Bridge
440 ci 330hp (2)
7.5 kw Kohler
"International Harbor Marina"
Friendsville TN, TN River
Back to top
Sponsor
Please Register : To weed out spammers, new members may not post until approved. An email is usually sent after approval. This forum is for Marinette Owners and other aluminum boat boaters who wish to share boating information. Aluminum Roamer owners are also welcome. (Do not post content you do not have the right to post and mass (robots) posters are unwelcome. We also have a marine electronics page and lots of Chrysler Engine info. State by what permission you copy content and give credit properly.) The site is now fixed with some more Chrysler information. We have space for pictures on the new location. Use shinkpic to autochange size http://www.onthegosoft.com/sp_download.htm

Great Sites - http://www.marinette.com Marinette Company

http://web.me.com/dougmrose/Doug_Roses_Website/Welcome.html

http://fastjeff.tripod.com/ Repair Tricks and Techniques for Marinettes

http://www.greatlakesmarinetteclub.com/

PLEASE post in the appropriate folder. Please, do not post your actual email address in publicly readable websites. The first rule is be a class act.
Back to top  
Roger2
#2 Posted : Saturday, August 14, 2010 4:56:05 AM(UTC)
Roger2

Rank: Marinette Royal Aluminum Poster (300+) posts

Groups: Member
Joined: 12/16/2007(UTC)
Posts: 567
Points: 879

Thanks: 3 times
Was thanked: 5 time(s) in 5 post(s)
There is suposed to be an isolation "gasket" between coupling halfves & insulation sleeves for each bolt along with an insulating washer on each side of the coupling, under bolt head & nut.
hope this helps.

Roger
Sea Jay
1983 37 double cabin, twin 230hp Volvo diesels, twin disk 1.5-1 20X 23 4 blade props
Back to top
jimski2
#3 Posted : Saturday, August 14, 2010 11:28:48 PM(UTC)
Rank: Top Rank Aluminum Star

Groups: Member
Joined: 11/3/2008(UTC)
Posts: 147
Points: 71

Was thanked: 3 time(s) in 3 post(s)
The stern tube should have non conductive packing and a special non brass cutlass bearing. The struts need the cutlass bearing and the bolts holding it should be isolated also.
Back to top
dougrose
#4 Posted : Sunday, August 15, 2010 2:47:05 AM(UTC)
dougrose

Rank: Marinette Royal Aluminum Poster (300+) posts

Groups: Member, Administration, Admin
Joined: 12/7/2007(UTC)
Posts: 1,332
Points: 1,746

Was thanked: 25 time(s) in 21 post(s)
I just put in a new strut and did NOT isolate it from the hull. I don't think you need to. The strut itself is aluminum, and the cutless bearing isolates it from the shaft. There was no sign that it had ever been isolated.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
Back to top
fishnatic
#5 Posted : Sunday, August 15, 2010 3:12:00 AM(UTC)
Rank: Dedicated Tin Star

Groups: Member
Joined: 3/2/2008(UTC)
Posts: 58
Points: 89
had the strut off my old 28 and present 29.5 never seen any evidense of being isolated
Back to top
Docsnow
#6 Posted : Sunday, August 15, 2010 3:42:10 AM(UTC)
Docsnow

Rank: Marinette Royal Aluminum Poster (300+) posts

Groups: Admin, Administration
Joined: 12/4/2007(UTC)
Posts: 1,871
Points: 4,247

Thanks: 2 times
Was thanked: 28 time(s) in 28 post(s)
About the only place I’d put any isolation protection would be on the S.S. bolts (8) I’d put a piece of shrink wrap on the treaded area that will come in contact with the AL. & plastic washers @ head & nut areas that will be in contact with AL. just to eliminate any chance dissimilar metal corrosion.
AnyWho just my ½ penny’s worth Whistle

Norm,

Big BigMs Live On Applause
http://www.picturetrail.com/gid23690601 Try it now there's music to listen to while U view the Big M's

http://www.PictureTrail..../index.php?clubID=20726 this one for the Pix club


 You'll have bad times, but they'll just wake you up to the good times you weren't paying attention to

Some people try to turn back their odometers.Not me, I want people to know "why" I look this way.I've traveled a long way and some of the roads weren't paved.
Back to top
Users browsing this topic
guest
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF 1.9.5.5 | YAF © 2003-2011, Yet Another Forum.NET
This page was generated in 0.115 seconds.