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  1. #1
    Gold Member Gold Member nocigarette's Avatar
    My Boats:
    1974 magnum sport 540 with a wicked scorpion racing engines tune up job...
    Join Date
    Mar 2003
    Grosse ile michigan

    alternator amp rating when running msd

    What amp should your alternater be when running a msd on a single engine application......I ask because my housing on my alternator was cracked and i think it was giving a weak charge to the batteries and in turn not firing my msd properly......If ya have had similar problems post your expierince please..........65amp is what a aftermarket marine alternator is and i dont think that is enough....

    There's nothing harmonious or Zen-like about a Cigarette ride. It's an anarchic kind of rush—the nautical equivalent of Viagra.

    still pouring hundies into this resin bucket................

  2. #2
    Registered paradigm shift's Avatar
    My Boats:
    29' Profile-V 1997
    Join Date
    Jun 2002
    65 amp is more than enough for your MSD no worries there. Exact current draw depends on which MSD you are running. Big end Stereo is another story though.

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