[C320-list] ANTICORROSION ZINC

[Larry Frank]

I have a Westerbeke and the engine zinc screws into the raw water side of
the heat exchanger and protects the raw water circuit from corrosion.  My
understanding is that the Yanmar is different and does not need this zinc
because of the selection of metals used in the raw water circuit. 

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Robert
Seastream
Sent: Thursday, September 30, 2010 8:14 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] ANTICORROSION ZINC

If I'm not mistaken, the lack of an 'engine zinc' on the 3GM30F engine  
block is because it uses an interior cooling system which is filled  
with 'antifreeze/coolant' (like Prestone).  The coolant is further  
cooled by pumping raw seawater over/through a 'heat exchanger'.  Thus,  
the interior cooling passages of the engine are kept separate from  
corrosive seawater.  Some (older) engines have no such cooling system  
and simply pump raw seawater through the engine cooling passages.   
Those engines need 'engine zincs'.

Bob Seastream
Intuition # 906

On Sep 30, 2010, at 4:49 PM, Dick Walker wrote:

> No Zink in our application.
>
>
> Dick Walker
> WindWalkerII #687
> 619.435.8986
>
>
>
> -----Original Message-----
> From: c320-list-bounces at lists.catalina320.com
> [mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of
> sail-ability at sympatico.ca
> Sent: Thursday, September 30, 2010 1:29 PM
> To: Catalina List
> Subject: [C320-list] ANTICORROSION ZINC
>
>
>
> My engine manual talks about a zinc in the engine; evidently it is  
> in a
> plug which is supposed to be identified as ANTI CORROSION ZINC. I've  
> looked
> all over the engine and cannot find it. I have the Yanmar 3GM30F.
>
> Help please?
>
> John M
>
> #574
> 		 	   		  =
>