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    Alternator

    For one reason and another I have been off the forum for a while, so it's good to be back.

    I have been searching various posts on 38XX alternators. I have been considering rewiring the port alternator for the house battery and the starboard for the start battery. It just seems silly to have the alternator that's farthest away charge the larger battery.

    Anyway, one of my OE Denso alternators has a fried rectifier which doesn't seem to be available anymore (if anyone knows where to find this part please let me know!). I have found a reman Denso for a decent price, but I'm also thinking this would be a good time to install something a but more commonly available, maybe a higher amperage Delco with the same J180 marine mount footprint. It seems that at least one other forum members has installed a 140 or 160 amp Delco 22SI.

    So, I'm asking anyone who has done this if there is anything to worry about regarding the alternator belt and the higher amperage rating of a Delco vs the 50 amp stock Denso alternator.

    Also I am curious as to what the forum has to say about installing a non marine specific alternator with regard to spark protection. I know we have diesels, but is this a concern?

    Julian
    1991 3888 210hp Hinos

    #2
    The minor extra length of cable isn't worth the effort to offset the "silly" factory routing. Don't go non-marine. Aside from exposure to corrosion it would compromise adding equipment like an inverter. You will get a bigger bang for your buck by installing a smart regulator such as http://www.amplepower.com/index.html rather than a bigger alternator.
    1989 26' then 1994 32' now 2001 39'

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      #3
      Wow! They are really proud of that controller.
      P/C Pete
      Edmonds Yacht Club (Commodore 1993)
      1988 3818 "GLAUBEN
      Hino EH700 175 Onan MDKD Genset
      1980 Encounter Sunbridge "Misty Blue" (Sold)
      MMSI 367770440
      1972 Chevrolet Nova Frame off Resto-mod in the garage
      Boating on the Salish Sea since 1948

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        #4
        Not sure of the alternator model, but a google search for denso rectifiers provided a lot of hits. Here's one: http://www.maniacelectricmotors.com/...SABEgIAvfD_BwE

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          #5
          Originally posted by Uncle_Bob View Post
          You will get a bigger bang for your buck by installing a smart regulator such as http://www.amplepower.com/index.html rather than a bigger alternator.
          Thanks. Yes I have been looking at Balmar external regulators

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            #6
            Originally posted by SuperiorDiver View Post
            Not sure of the alternator model, but a google search for denso rectifiers provided a lot of hits. Here's one: http://www.maniacelectricmotors.com/...SABEgIAvfD_BwE
            Thanks. There are indeed many Denso rectifiers available, but after hours of perusing I have yet to find one lists its suitability for the OEM alternator part number.

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