the battery on my boat looses juice quicly and dies out. I was told that the engine has an alternator. I was also told that if the cables were crossed the diodes on the engine would burn out in a matter of seconds. I am a newbie to all of this, any advice or info will be helpful in trying to solve this problem. <br />P.S. I don't have a shop manual either any info on where i could get one of those will lso be helpful.