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two altenators 1 mbss-gctid349699

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    two altenators 1 mbss-gctid349699

    i have a 1977 bayliner 3050 encounter twin year 2000 mercruser 350,s

    my question is can i run them on the mbss sitch on " all " the engines both have altenators

    right now i have two mbss switches and will be changing to 1 mbss switch.is there any problem

    with both alenators feeding the whole battery bank at the same time ?

    thanks in advance !!

    #2
    Remember that MBSS = main battery selector switch.

    This means that it selects from two sources (#1 start bank & #2 House Bank) and will offer one output ("common" terminal) only.

    A single MBSS w/ twins means that it will be powering both engines simultaneously and that there'll be no separation regarding which engine would powered up regardless of MBSS position.

    The only separation would be between the starting bank and the HLBB ( house load battery bank).

    If you're ok with both engines using one MBSS, I suppose it would be fine.

    I don't think that there's an issue with the two alternators!

    .
    Rick E. Gresham, Oregon
    2850 Bounty Sedan Flybridge model
    Twin 280 HP 5.7's w/ Closed Cooling
    Volvo Penta DuoProp Drives
    Kohler 4 CZ Gen Set

    Comment


      #3
      I using only 1 switch it should be the type that has #1 or #2 or all/both.

      http://www.google.com/products/catal...ed=0CH4Q8wIwBw
      Pat says: DO-IT-RIGHT THE FIRST TIME!

      Bayliner 3870 "ALASKA33)
      Twin 350 GM power
      Located in Seward, AK
      Retired marine surveyor

      Comment


        #4
        boatworkfl wrote:
        I using only 1 switch it should be the type that has #1 or #2 or all/both.
        Unless something has changed, an MBSS is #1 or #2 or all/both and a Batt Switch is Off/On.
        Rick E. Gresham, Oregon
        2850 Bounty Sedan Flybridge model
        Twin 280 HP 5.7's w/ Closed Cooling
        Volvo Penta DuoProp Drives
        Kohler 4 CZ Gen Set

        Comment


          #5
          2850Bounty wrote:
          Unless something has changed, an MBSS is #1 or #2 or all/both and a Batt Switch is Off/On.
          I forgot the on/off part, I am in the habit of using the term battery switch for a MBSS, not all boat owners do not know what a MBSS is.
          Pat says: DO-IT-RIGHT THE FIRST TIME!

          Bayliner 3870 "ALASKA33)
          Twin 350 GM power
          Located in Seward, AK
          Retired marine surveyor

          Comment


            #6
            And I only have battery switches .. on and off

            Not a MBSS. LikeTim Allen I rewired it.
            Jim McNeely
            New Hope a 2004 Bayliner 305 Sunbridge Express Cruiser
            Twin 5.7s with Bravo2 drives
            Brighton, Michigan USA
            MMSI # 367393410

            Comment


              #7
              JimMc wrote:
              And I only have battery switches .. on and off Not a MBSS. Like tim allen I rewired it.
              Yes, but yours is more like a NASA Engineer designed it!
              Rick E. Gresham, Oregon
              2850 Bounty Sedan Flybridge model
              Twin 280 HP 5.7's w/ Closed Cooling
              Volvo Penta DuoProp Drives
              Kohler 4 CZ Gen Set

              Comment


                #8
                Awe shucks Rick , your too kind.

                If I was to do it all over there are a few things I might change / tweak but overall I am pleased.

                BTW -

                My twin engines each have there own starting battery.

                I also have a Main House Bank consisting of Four 6V Golf Cart type batteries. Total capacity over 400Amp Hours.

                As each engine's starting battery recharges which only takes minutes an Auto Charge Relay sends charge from that engines alternator to the House Battery Bank. Each engine has a Auto Charge Relay to send charge to the House Battery Bank. Within a few minutes of the engines running they are both feeding charge to the house bank.

                This system has served us well.

                The starting batteries only serve their associated engines needs.

                Virtually all on board systems run from the House Battery Bank.

                If I would need to I can transfer power remotely from the House Battery Bank to start either or both engines.

                Here are those Auto Charge Relays. (Yes , I need to shorten some of the cables.)


                Jim McNeely
                New Hope a 2004 Bayliner 305 Sunbridge Express Cruiser
                Twin 5.7s with Bravo2 drives
                Brighton, Michigan USA
                MMSI # 367393410

                Comment


                  #9
                  boatworkfl wrote:
                  I forgot the on/off part, I am in the habit of using the term battery switch for a MBSS, not all boat owners do not know what a MBSS is.
                  I know...... it makes sense that some systems do use an ON/OFF swtich, and others switch between multiple battery banks. I think that the MBSS abreviation began here on the BOC.

                  It is a "main", it deals with "batteries", it does "select" and it's a "switch", so it does seem fitting!
                  Rick E. Gresham, Oregon
                  2850 Bounty Sedan Flybridge model
                  Twin 280 HP 5.7's w/ Closed Cooling
                  Volvo Penta DuoProp Drives
                  Kohler 4 CZ Gen Set

                  Comment


                    #10
                    2850Bounty wrote:
                    I know...... it makes sense that some systems do use an ON/OFF swtich, and others switch between multiple battery banks. I think that the MBSS abreviation began here on the BOC.

                    It is a "main", it deals with "batteries", it does "select" and it's a "switch", so it does seem fitting!
                    Actually... MBSS has been around a long time. You're just the first one to attempt to rename it and claim it.

                    Perko 8501DP Marine Battery Selector Switch



                    As far as two alternators... Here's what I have on mine:

                    http://"http://www.westmarine.com/bu...el # 12032991)


                    Custom CNC Design And Dash Panels

                    iBoatNW

                    1980 CHB Europa 42 Trawler- "Honey Badger"

                    Comment


                      #11
                      SomeSailor wrote:
                      1.... Actually... MBSS has been around a long time. You're just the first one to attempt to rename it and claim it.

                      2... Perko 8501DP Marine Battery Selector Switch


                      1... Are we back at it again?

                      2... As for the 90* sweep Perko shown, you guys should break one of these open sometime and look at the small contacts required to make one work within a 90* sweep.

                      I don't have the same issue with the full sweep Perkos, but they too use relatively small contacts.

                      IMO, if you want a good quality MBSS, look at the Blue Seas, Guest or Cole Hersee products.

                      I do like the BALMAR Max Charge Digital 12 Volt Regulator for Dual Alternators that you're using, Mike.... that does solve the issue for anyone concerned.

                      .
                      Rick E. Gresham, Oregon
                      2850 Bounty Sedan Flybridge model
                      Twin 280 HP 5.7's w/ Closed Cooling
                      Volvo Penta DuoProp Drives
                      Kohler 4 CZ Gen Set

                      Comment


                        #12
                        I'm not back at anything... just saying that the term MBSS has always meant Marine Battery Selector Switch (1/2/Both/Off) to many of us. And before you go re-inventing electronics terms, a "switch" isn't just for "On / Off".

                        As far as the Perko... no emotional connection at all. Never had one fail in many years is all.

                        The Balmar regulator is great for systems that have high ouptut alternators alongside smaller ones. I have a Balmar 210A on my Stbd motor and an OEM 85A on the Port side motor. The regulator controls both.
                        Custom CNC Design And Dash Panels

                        iBoatNW

                        1980 CHB Europa 42 Trawler- "Honey Badger"

                        Comment


                          #13
                          SomeSailor wrote:
                          I'm not back at anything... just saying that the term MBSS has always meant Marine Battery Selector Switch (1/2/Both/Off) to many of us. And before you go re-inventing electronics terms, a "switch" isn't just for "On / Off".
                          I don't disagree, Mike, I've pretty much always said MBSS = main battery selector switch, and BS = Battery Switch.

                          Both the BS and MBSS are switches, one simply performs the additional task of selecting between two sources.

                          Did you read a thread or two that implied that a BOC member was taking credit for the MBSS abreviation?
                          Rick E. Gresham, Oregon
                          2850 Bounty Sedan Flybridge model
                          Twin 280 HP 5.7's w/ Closed Cooling
                          Volvo Penta DuoProp Drives
                          Kohler 4 CZ Gen Set

                          Comment


                            #14
                            2850Bounty wrote:
                            I don't disagree, Mike, I've pretty much always said MBSS = main battery selector switch, and BS = Battery Switch.

                            Both the BS and MBSS are switches, one simply performs the additional task of selecting between two sources.

                            Where did you read anything that implied that a BOC member was taking credit for the MBSS abreviation?
                            I think you're missing my point Rick... it's just MARINE not MAIN.

                            The credit portion probably came from:

                            2850Bounty wrote:
                            I think that the MBSS abreviation began here on the BOC.
                            Custom CNC Design And Dash Panels

                            iBoatNW

                            1980 CHB Europa 42 Trawler- "Honey Badger"

                            Comment


                              #15
                              Ok, then I'm going to re-coin it MMBSS!

                              When I first joined, Mike, I don't recall anyone using "MBSS", but I do recall seeing "battery switch", "Perko", "1/All/2/OFF switch", "Battery Isolator Switch", etc.

                              Apparently the MBSS just seemed to evolve.

                              If we're going to split hairs over Marine -vs- Main, I gues the "M" leaves it open to each person's interpretation.

                              I'm good with that!

                              .
                              Rick E. Gresham, Oregon
                              2850 Bounty Sedan Flybridge model
                              Twin 280 HP 5.7's w/ Closed Cooling
                              Volvo Penta DuoProp Drives
                              Kohler 4 CZ Gen Set

                              Comment

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