This sounds like a warranty thing at just three months old. They won't like hearing it if you put an automotive unit in a boat especially if in salt water! They do make stereos just for the harsh environment for boats. If a large boat and it's in an enclosed cabin I've gotten away with automotive stuff. I'll bet you could just swap it for a new one at its age, T
Tom Greenleaf - MetroWest Boston - USA
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http://www.autoacsystems.com/tomgreenleaf/