There's also an old Navy trick for corrosion on brass and copper. Clean it completely, then make your connections, then coat the whole thing with clear lacquer.
I've used this brand http://www.super-spray.com/prods/76.html on several things and it works very well. But truthfully, just about any clear lacquer spray will work just as well. As long as you don't disturb the coating after it dries it will last for years with no corrosion on the metal it's protecting. Just remember to make your connections before you coat the terminals. 
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
If God didn't have a purpose for us we wouldn't be here, so
Live simply, Love generously, Care deeply, Speak kindly.
(Leave the rest to God) 
Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
Last edited by Destroyer; 04-20-2013 at 11:47 PM.
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