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  1. #1
    Powder Springs, Georgia USA jcat's Avatar
    Join Date
    Apr 2008

    What should the battery voltage be when the engine is running?

    2006 FX High Output Cruiser......

    My battery goes dead after a day or two (sitting) and I'm trying to figure out:

    Is my battery bad ?

    Is it not getting charged ? (What should my volt meter read when the engine is running?)

    Is there a drain on it when the Waverunner is not being used ?

    Can anyone tell me the steps I need to take in order to repair this ?

  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    near Toronto, Canada
    Generally speaking when an engine is running the battery voltage should be between 13.5 volts and 14.5 volts, give or take a little.

    Battery voltage below 13.0 volts with the engine running means the battery is not charging.

    How old is the battery? A typical lead-acid battery (with six filler caps down the middle) only lasts a few years, sometimes only 2 or 3.

    A factory sealed AGM battery should last maybe 5-6 years, depending on how it is cared for.

  3. #3
    SurfRider's Avatar
    Join Date
    Jun 2010
    The battery voltage should be around 14 volts when it is charging. It may be a bit lower if the battery is really low and it's trying to juice it up.

    I don't believe that there should be much drain on the battery. If the battery is a 2006, just be happy that it lasted that long! Time to buy a new one.

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