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  1. Garmin Echo 550C Depth Finder

    OGF Marketplace
    Excellent condition - comes with a padded case as shown (cables/transducer not included). $125 + Priorty shipping w/ tracking Paypal or cashiers checks/money orders accepted
  2. Garmin Echo 550c

    I recently got ahold of a Garmin Echo 550c which didn't come with a power cable. I was just trying to look for the schematics for this model but can't seem to find any. I can't figure out which of the 4 pins is power and which is ground. The owner's manual doesn't mention it at all and after...