Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 08-02-2015, 09:39   #1
Registered User
 
scuba0_1's Avatar

Join Date: Mar 2011
Location: naples
Boat: 2005 Catalina 350
Posts: 670
Change your Zink

Not mine got the pic from some one else. Holy smokes.

Sent from my SM-N910V using Cruisers Sailing Forum mobile app
Attached Thumbnails
Click image for larger version

Name:	1423413522309.jpg
Views:	229
Size:	158.5 KB
ID:	96826  
__________________

__________________
scuba0_1 is offline   Reply With Quote
Old 08-02-2015, 09:50   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Nov 2012
Location: Long Beach, CA
Boat: Tayana Vancouver 42
Posts: 1,853
Re: Change your Zink

Speaking of zincs, I've been changing the zinc anode on my MaxProp every month or at most two. I thought it was from stray current in some " hot " marinas I was in. But even anchored out for a month the zinc is depleted. There is no other zinc on the shaft, only a pair if larger rectangular zincs on the keel which last a season or two. Someone suggested that I add a shaft brush tied into the bonding system. Any thoughts on a shaft brush?


S/V B'Shert
__________________

__________________
Tayana42 is offline   Reply With Quote
Old 08-02-2015, 10:13   #3
Registered User
 
Orion Jim's Avatar

Join Date: Dec 2008
Location: Noank, Ct. USA
Boat: Cape Dory 31
Posts: 1,075
Images: 6
Re: Change your Zink

What brand is the sail drive? If it was still working in this condition I've got to get one
__________________
Orion Jim is offline   Reply With Quote
Old 08-02-2015, 10:27   #4
Registered User
 
Terra Nova's Avatar

Join Date: Apr 2007
Location: Marina del Rey, California
Boat: Freya 39 cutter- Terra Nova
Posts: 3,645
Re: Change your Zink

Wow! I'll stick with stainless and bronze.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
Terra Nova is offline   Reply With Quote
Old 08-02-2015, 10:27   #5
Registered User
 
Dhillen's Avatar

Join Date: Oct 2011
Location: South Pacific
Boat: Oyster 53
Posts: 359
Re: Change your Zink

Quote:
Originally Posted by Tayana42 View Post
Speaking of zincs, I've been changing the zinc anode on my MaxProp every month or at most two. I thought it was from stray current in some " hot " marinas I was in. But even anchored out for a month the zinc is depleted. There is no other zinc on the shaft, only a pair if larger rectangular zincs on the keel which last a season or two. Someone suggested that I add a shaft brush tied into the bonding system. Any thoughts on a shaft brush?


S/V B'Shert
I don't have an answer but am curious as well. The zinc on my MaxProp is always the first to go.

Dhillen
__________________
www.theseaissalt.com
Dhillen is offline   Reply With Quote
Old 08-02-2015, 12:24   #6
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Re: Change your Zink

There is no zinc in the world that would protect against that. Besides, the zinc is still attached! That is impressed current - either from a wiring problem inside the boat, or a marina problem, or a problem on an adjacent boat.

It is not simple galvanic corrosion from a used zinc.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Old 08-02-2015, 12:57   #7
Registered User
 
scuba0_1's Avatar

Join Date: Mar 2011
Location: naples
Boat: 2005 Catalina 350
Posts: 670
Re: Change your Zink

I've never tried can you drop a metering device and the water to see if there's a current

Sent from my SM-N910V using Cruisers Sailing Forum mobile app
__________________
scuba0_1 is offline   Reply With Quote
Old 08-02-2015, 14:47   #8
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,592
Re: Change your Zink

Quote:
Originally Posted by Jim Walsh View Post
What brand is the sail drive? If it was still working in this condition I've got to get one
Looks like a Yanmar.


Quote:
Originally Posted by colemj View Post
There is no zinc in the world that would protect against that. Besides, the zinc is still attached!
The anode 100% depleted. Maybe it had been for years.
__________________
fstbttms is offline   Reply With Quote
Old 09-02-2015, 05:33   #9
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Re: Change your Zink

Quote:
Originally Posted by fstbttms View Post
The anode 100% depleted. Maybe it had been for years.
Isn't the anode still bolted onto it? I can't tell from the pic, but it looks like there is an anode between the prop hub and drive.

Even with the anode gone, this wasn't galvanic corrosion from prop or internal components. Not even in many, many years.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Old 09-02-2015, 05:52   #10
Registered User
 
ontherocks83's Avatar

Join Date: Aug 2013
Location: Massachusetts
Boat: Checkmate Strobe 201
Posts: 1,593
Re: Change your Zink

I desperately want to move our boat to the ocean but pics like this make me really appreciate being on a large lake.

I don't know if people even know what zincs are on the lake.
__________________
-Si Vis Pacem Para Bellum
-Molon Labe
ontherocks83 is offline   Reply With Quote
Old 09-02-2015, 06:51   #11
cruiser

Join Date: Jan 2012
Location: Ocean Springs, MS
Posts: 279
Re: Change your Zink

colemj is right. Volvo is very particular about instruction how to electrically isolate the drive from the engine, and I'd suggest that this drive, which isn't a Volvo, was never isolated

The zinc on the prop is still there. Also looks like a Gori propeller, which looks in good nick. Maybe because it's rubber-bushed to isolate it.
__________________
jaybird1111 is offline   Reply With Quote
Old 09-02-2015, 08:21   #12
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,592
Re: Change your Zink

Quote:
Originally Posted by jaybird1111 View Post
The zinc on the prop is still there. Also looks like a Gori propeller, which looks in good nick. Maybe because it's rubber-bushed to isolate it.
It is a Gori prop but half of the anode is completely missing on that as well.
__________________
fstbttms is offline   Reply With Quote
Old 09-02-2015, 08:45   #13
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,592
Re: Change your Zink

Quote:
Originally Posted by scuba0_1 View Post
Not mine got the pic from some one else. Holy smokes.



Sent from my SM-N910V using Cruisers Sailing Forum mobile app


It could be worse

__________________

__________________
fstbttms is offline   Reply With Quote
Reply

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
Yanmar Heat Exchanger Zink gmcairns Engines and Propulsion Systems 2 16-06-2014 12:48
Short life of heat exchanger zink Guy Engines and Propulsion Systems 2 03-04-2014 04:58
To Change or Not To Change gbendaly Engines and Propulsion Systems 1 08-08-2009 05:27
Oil change causes oil pressure change. theonecalledtom Engines and Propulsion Systems 9 16-06-2008 15:10



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 12:57.


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.