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- From: dbk@phx.mcd.mot.com (Dave Kinzer)
- Subject: Ohhh Nooo....More Zinc Questions
- Message-ID: <1992Dec31.161759.15355@phx.mcd.mot.com>
- Summary: Where are they on my engines?
- Keywords: Zinc
- Sender: dbk
- Nntp-Posting-Host: teroach.phx.mcd.mot.com
- Reply-To: teroach!dbk@phx.mcd.mot.com (Dave Kinzer)
- Organization: Motorola Analog Integrated Circuits Division
- Date: Thu, 31 Dec 1992 16:17:59 GMT
- Lines: 50
-
- I have freshwater cooled Mercruiser 7.4L Blue Water inboards in my
- boat, and I have been unable to find if and where they put the pencil
- zincs for protection. I would have expected them to be in the heat
- exchanger, but looking at them (and the parts book), I was unable to
- locate them. The owner's manual makes no mention of them.
-
- Does anybody have one (or more) of these engines and know where
- the zinc is? It has occured to me (since I was last at the boat) that
- they might be screwed into the seawater pump or the strainer.
-
-
- Ok, for you guys who are layed up for the winter, here is Dave's winter
- project #127995:
-
- Freshwater flush system:
-
- Tee Fitting
- __________________________________________________
- / ________________ _______________ _________ To Engine
- | | | | | |
- |X| Seacock |X| Ball Valve | | Strainer
- | | | | ------
- |\| Check Valve
- | |
- { } Female Hose Fitting
-
- The tee fitting allows unrestricted water flow to the engine, so it
- should work as if the flush system were not even there. The check valve
- is there to prevent "accidents" from occuring (i.e. it is impossible to
- sink the boat by having the seacock and ball valve open).
-
- For my style of boating, which is going every three or so weeks for
- a few days, this makes it really easy to get all the salt water out
- of the system. Just hook up a hose and open the ball valve. After
- a minute, close the seacock and let it run a few more minutes to flush
- the equipment. After I'm done, I poke a screwdriver into the check valve
- to minimize the amount of water left standing in the system.
-
- The total cost for this is in the neighborhood of $50 per system
- for the tee, valves & various pipe nipples in bronze (West Marine).
- I put these on my generator and A/C systems over the Christmas holiday,
- and will place them on the engines next time I'm there. I screwed them
- directly into the strainer inlet so they became one with the bonding system.
-
- I thought about using something like a Prestone radiator flush kit,
- but I wasn't as comfortable with it as I am with the bronze stuff.
-
- Happy boating,
- -Dave
-
-