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    battery isolator

    I would like to install an isolator for my starting and trolling batteries. My engine is a 40hp 2 stroke cycle Mercury. First, what amp isolator do I need? Second, there are two wires connected to the positive post on the starting battery, is the small one the charge wire or do I need to come...
  2. G

    Tachometer

    I have a 2003 Mercury 40 hp. 2 stroke and would like to have a shop tach. for tune up's and to check the accuracy of my boat tach. Can someone recommend an inexpensive ( I live in the deep country so shop a lot on Amazon) type of tach. and how to hook it up. Thanks.
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