Question about Eagle FishElite 320 GPS Receiver

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Cuda 300 The unit works fine as long you are in neutral but, the second you shift into gear the unit shuts off. Its powered thru the ignition switch. I dont know what would cause this, let me know if you have an idea.

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  • kjg345 Feb 25, 2009

    Its an imboard mercruiser 140hp engine. I just replaced the batteries before the trip so they are new. Any other thoughts?

  • kjg345 Feb 25, 2009

    Its an imboard mercruiser 140hp engine. I just replaced the batteries before the trip so they are new. Any other thoughts?

  • kjg345 Feb 26, 2009

    No it will not operate in gear at all.


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Marine electronics should never be powered through an ignition switch. A sudden drop in voltage will cause it to shut off. If your boat is powered by a four stroke outboard it probably is not generating enough current to meet the demands of the engine and the electronics. Four stroke outboards generally have to run at high rpms to generate enough current to charge the battery. Old or poorly maintained batteries could also contribute to your problem.

Posted on Feb 24, 2009

  • Paul Hyde
    Paul Hyde Feb 25, 2009

    After you shift into gear and the unit shuts off, can you turn the unit on while it is still in gear? Putting the engine under load could be causing a temporary voltage drop which will cause most electronics to shut off. Since you have more than one battery, one should be designated as the starting battery and the other should be designated as the house battery. The starting battery should be the one you use just for starting the motor. No electronics should be attached to that battery via the ignition switch. Your electronics should be attached to the house battery via a direct feed from the battery to a power distribution buss. A battery isolator should be used along with a battery switch to make sure that the house battery gets charged by the engine but remains isolated from the starting battery. The switch allows you to use the house battery for starting if the the starting battery goes dead.

  • Paul Hyde
    Paul Hyde Feb 26, 2009

    Is this a new development or have you always had this problem?

    Since it only happens when your engine is in gear, that suggests it is a problem with the engine's charging system, not the fishfinder itself.

    It can only be one of two things, low voltage or electrical interference/noise from the charging system. I can't offer any more advice without actually getting on the boat. You should have a mechanic check out your alternator, voltage regulator (if there is one), and your battery wiring.

    Even if you can find and repair the problem with the charging system, you will probably find that you will have to move the Fishfinder off the ignition circuit.


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