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hummingbird 550 problems

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i bought my dad a hummingbird 550 for the front of the boat for fathers day and its been causing him problems. It will read like 2 feet of water in like 10 feet and he cant figure out how to read it. And yes he did throw away the directions

  • Super User

You can download a manual from the Humminbird web site. Reading it may solve operational and installation problems.

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