Reply
 
Thread Tools Display Modes
 
Old 02-17-2011, 05:59 PM   #1
Guru
 
JohnP's Avatar
 
City: Toms River
Country: USA
Vessel Name: D U E T T E
Vessel Model: 1996 36' Island Gypsy
Join Date: Dec 2009
Posts: 1,109
Pros and Cons of Prop Anode Zincs

I have no space for a shaft zinc on my boat (besides the two on my rudder post).

I do have a anode on the end of the shaft=acorn shaped that has a center hex bolt.

As the zinc dissolves I noticed the hex bolt needs retightening. Is that normal or am I waiting to long to change it?

During my Winter in water layup I hang a large zinc overboard wired to the rudder post, prop shaft and bonding system.

If I installed a zinc block on the transom could I do away with prop zinc set up?

Just planning haul out- to do list.

JohnP
__________________
Advertisement

JohnP is offline   Reply With Quote
Old 02-17-2011, 08:26 PM   #2
Guru
 
Carey's Avatar
 
City: Bellingham, WA
Country: USA
Vessel Name: Happy Destiny
Vessel Model: Custom Lobster Yacht
Join Date: Oct 2007
Posts: 1,101
Pros and Cons of Prop Anode Zincs

Quote:
JohnP wrote:

I have no space for a shaft zinc on my boat (besides the two on my rudder post).

I do have a anode on the end of the shaft=acorn shaped that has a center hex bolt.

As the zinc dissolves I noticed the hex bolt needs retightening. Is that normal or am I waiting to long to change it?

During my Winter in water layup I hang a large zinc overboard wired to the rudder post, prop shaft and bonding system.

If I installed a zinc block on the transom could I do away with prop zinc set up?

Just planning haul out- to do list.

JohnP
I have both a shaft zinc and an acorn size H on the tail. mine does not erode under the bolt head at a rate that causes loosening. Maybe you aren't changing it often enough.*

I would not go without that acorn. Your prop will become the anode.


-- Edited by Carey on Thursday 17th of February 2011 09:31:40 PM
__________________

Carey is offline   Reply With Quote
Old 02-18-2011, 07:17 AM   #3
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 5,742
RE: Pros and Cons of Prop Anode Zincs

JohnP: As Carey has, we also have the size H prop nut anode. We have never had to tighten them up. Check the cotter pin that holds the nut on to make sure that it doesn't interfere with the seating of the anode. If the anode doesn't sit square on the nut, I could see where it could loosen over time.

Larry/lena
Hobo KK42
Puerto Madero, Chiapas, MX
Larry M is online now   Reply With Quote
Old 02-18-2011, 09:04 AM   #4
Guru
 
Phil Fill's Avatar
 
City: Everett Wa
Country: US
Vessel Name: Eagle
Vessel Model: Roughwater 58 pilot house
Join Date: Oct 2007
Posts: 2,919
RE: Pros and Cons of Prop Anode Zincs

I have two hanging from the Eagle, one connected to the bow thruster as its metal and one from the engine room.* The reason is the current is very small and reduces the further away from a zinc as the zincs are at each end of the boat, 45 to 50 ft away. The bow thruster zincs are small, the first to go and last about 6 months, so they are almost gone by the time they get changed, and its a long run from the bow to the stern zincs.* The one on the engine room is mid way and is to double protect.* They do seem to make the other zincs last longer. *


*
As for a shaft zinc they make a shaft brush that rides on the shaft in the engine room that connect to the zinc loop, cost about 40 bucks.* I have seen them on several new boats.*
Phil Fill is offline   Reply With Quote
Old 02-20-2011, 07:52 AM   #5
Guru
 
Keith's Avatar
 
Vessel Name: Anastasia III
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,716
RE: Pros and Cons of Prop Anode Zincs

I have the same setup and have never really noticed any loosening. Well, except for one time where the diver didn't put it on correctly and the whole thing was gone, bolt and all.

When you put the zinc on, remember to seat it with some light taps with a hammer. Tighten the bolt again, light taps until you get all the slack out. When I do it out of the water, I also use a little blue loctite on the bolt.
Keith is offline   Reply With Quote
Old 02-20-2011, 11:29 AM   #6
Guru
 
Carey's Avatar
 
City: Bellingham, WA
Country: USA
Vessel Name: Happy Destiny
Vessel Model: Custom Lobster Yacht
Join Date: Oct 2007
Posts: 1,101
RE: Pros and Cons of Prop Anode Zincs

Quote:
Phil Fill wrote:
I have two hanging from the Eagle, one connected to the bow thruster as its metal and one from the engine room.The reason is the current is very small and reduces the further away from a zinc as the zincs are at each end of the boat, 45 to 50 ft away. The bow thruster zincs are small, the first to go and last about 6 months, so they are almost gone by the time they get changed, and its a long run from the bow to the stern zincs.The one on the engine room is mid way and is to double protect.They do seem to make the other zincs last longer.
As for a shaft zinc they make a shaft brush that rides on the shaft in the engine room that connect to the zinc loop, cost about 40 bucks.I have seen them on several new boats.
I failed to mention in my previous post, that my electrician convinced me to add the shaft brush many years ago. It may seem like overkill, but I now have the acorn on the tail, a shaft zinc about a foot up the shaft, and just inside the engine room is the spring loaded brush, which is tied into the bonding system. It's doing the job.

*
__________________

Carey is offline   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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pros and cons of a diesel cook stove? Badger Other Trawler Systems 26 05-15-2013 01:12 PM
Clearview windows - pros and cons Singleprop Other Trawler Systems 15 09-09-2011 05:33 AM
Water heater anode Keith Other Trawler Systems 13 09-24-2010 04:32 AM
Shaft zincs marinetrader Power Systems 10 12-23-2009 11:25 AM
No zincs on airplanes Keith General Discussion 0 10-15-2007 05:28 AM




All times are GMT -5. The time now is 06:51 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012