Thanks Josh and all,
Very helpful. I can rest my anxious mind now...
:^)
Bruce Whitmore
(847) 404-5092 (mobile)
bwhitm...@sbcglobal.net
From: Josh Muckley via CnC-List <cnc-list@cnc-list.com>
To: C&C List <cnc-list@cnc-list.com>
Cc: Josh Muckley <muckl...@gmail.com>
Sent: Tuesday, June 27, 2017 1:50 PM
Subject: Re: Stus-List Zinc in heat exchanger, Yanmar 3JH2e
The heat exchangers are made of a copper-nickel alloy which is also commonly
used for all types of saltwater interfaces in the power generation and military
industries. No anodes are required. Anodes are required in a raw water cooled
engine because there is no way to prevent the saltwater from touching the cast
iron engine blocks. Similarly in the military and industrial heat exchangers
the shells are made of carbon steel and as a result anodes are attached at
those locations.
As for our freshwater cooled engines the cast iron is protected by the cocktail
of chemical additives in the glycol coolant. The coolant also has lubricants
to help protect the waterpump shaft seals.
In the freshwater versions of our engines the block is exactly the same as the
raw water counterparts. The anode ports are simply plugged with a screw in
pipe plug. This provides an opportunity to install a block heater to keep
condensation from accumulating during the off season.
I had stuck rings one year and I've kept a block heater ever since with no
recurrence of the stuck rings.
Zerostart 310-0003 Engine Block Heater
https://www.amazon.com/dp/B002UNASYS/ref=cm_sw_r_cp_apa_iOPuzb6CAMJER
Josh MuckleyS/V Sea Hawk1989 C&C 37+Solomons, MD
On Jun 27, 2017 8:52 AM, "Bruce Whitmore via CnC-List" <cnc-list@cnc-list.com>
wrote:
Hello all,
I think I know the answer to this question, but I just want to confirm. On a
Yanmar 3JH2E, are there any sacrificial anodes in the heat exchanger or
anywhere else to replace?
I've checked the repair manual for the engine, but found nothing.
Just wanting to be sure... Bruce Whitmore1994 C&C 37/40+, "Astralis"Madiera
Beach, FL
(847) 404-5092 (mobile)
bwhitm...@sbcglobal.net
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This list is supported by the generous donations of our members. If you wish to
make a contribution to offset our costs, please go to:
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All Contributions are greatly appreciated!
_______________________________________________
This list is supported by the generous donations of our members. If you wish to
make a contribution to offset our costs, please go to:
https://www.paypal.me/stumurray
All Contributions are greatly appreciated!
