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Mike Slater[_2_] Mike Slater[_2_] is offline
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First recorded activity by BoatBanter: Jun 2009
Posts: 25
Default Merc outboard lower cowling drain valve


wrote in message
...
On Sat, 08 Aug 2009 21:52:51 GMT, "Mike Slater"
wrote:

Success. Here is my first test and afterwards there wasn't a single drop
of
water on the cowling. http://www.youtube.com/watch?v=SrMiNfpOLqQ

ps: What did you mean by "Stainless will eat up the aluminum... "


Stainless will set up electrolysis in the aluminum and you will end up
with a big white powdery hole where the bolt was.
Salt water will really speed up this reaction but any water will do.
There is a teflon compound you can put in the joint to slow it down
but if strength is not a real big deal, aluminum bolts are better.


I am very glad you mentioned this concept. I understand what electrolysis
is, but never delved into or really thought about what metals are
sacrificial to the other aside from my anodes. I can find aluminum, but how
about just plain galvanized screws/bolts?