[C320-list] Perkins M30 zinc?

[Robert Seastream]

I think only raw sea water cooled engines would require zincs mounted  
somewhere on the engine block.  Engines like the 3GM30F which are  
cooled via a heat exchanger that pumps seawater over the engine water  
jacket (which is filled with antifreeze/coolant) wouldn't have need  
for zincs.

Bob

On Jul 7, 2011, at 3:02 PM, Jeff Hare wrote:

> Our Yanmars don't have zincs. Many other engines don't either. One  
> problem with zincs is they can crumble and damage the engine water  
> pump. Also if the engine is bonded well to the shaft, these zincs  
> should do the job.
>
> That's my understanding, but there may be different reasons also.
>
> -jeff
>
> jpmesa at aol.com wrote:
>
>
>
> I have noticed some of the Yanmar engine owners talk about engine  
> zincs. I have the older Perkins M30 (Hull #112).
> I have looked everywhere on the engine and surrounding area and I  
> haven’t found a zinc.
> Any other Perkins owners know if we have one? And if not, why?
> Thanks, John Holokai 2
>