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2859 YANMAR RE-POWER 6LPA or LV8?-gctid406587

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    2859 YANMAR RE-POWER 6LPA or LV8?-gctid406587

    I'm re-powering my 2859 with one of these stern drive engines, YANMAR 6LPA or LV8 anyone know if one motor will give better economy over the other? The LPA is a 315HP 6 cylinder the LV8 320 and 8 cylinder. which motor will give me the best overall performance? The price difference is 10K us dollars. I'm interested in extending my range for Scuba diving off California coast. I currently have a Merc 7.4L MCM.

    #2
    Stryc wrote:
    I'm re-powering my 2859 with one of these stern drive engines, YANMAR 6LPA or LV8 anyone know if one motor will give better economy over the other? The LPA is a 315HP 6 cylinder the LV8 320 and 8 cylinder. which motor will give me the best overall performance? The price difference is 10K us dollars. I'm interested in extending my range for Scuba diving off California coast. I currently have a Merc 7.4L MCM.
    Not too many folks here have had the opportunity to make that decision.

    The larger engine would at first glance not be working as hard, but thats just a guess.

    We went with a 375HP 496 mercruiser engine. Our cruise was 27 knots at 1.0 NMPG.

    Hopefully you'll get better than that with the diesel plant.

    KEVIN SANDERS
    4788 LISAS WAY - SEWARD ALASKA
    www.transferswitch4less.com

    Whats the weather like on our boat
    https://www.weatherlink.com/embeddab...59665f4e4/wide


    Where are we right now? https://maps.findmespot.com/s/36S4

    Comment


      #3
      Like any good industrial-based engine, Yanmar provides torque, horsepower and fuel consumption graphs. Both engines offer very similar economy as you can see. The i6 has 2 less cylinders so it has a lower component count, and is about 10% lighter. The inline will give you the smoothest operation as well.

      Some decisionmakers - Are the torque curves similar? I wouldn't be worried about peak horsepower whatsoever.

      Do both/either engines fit?

      What is the history on each engine? Are they both similar in repair costs, rebuild costs, etc? The i6 would be "cheaper" in theory, but if it's much rarer/harder to find it may be more expensive to work on.

      If both come out close, I'd probably pick the i6.

      Comment


        #4
        Stryc,

        You will probably have better luck posting your question on www.boatdiesel.com. It costs $25 a year but it is the best site for diesel power questions.
        John Rupp
        1989 2455 Ciera Sunbridge
        5.8 OMC Cobra

        1989 3288
        Starshine
        Hino 135

        Comment


          #5
          I looked at the yanmar when I repowered and found it was way to long for an easy install without cutting bulkheads and shortening my fuel tank so it wasn't a viable option for me, I decided on the D4 series of Volvo diesels as they have the same foot print as a V8 and the volvo was a 4 cylinder but made almost as much hp as the yanmar 6 315hp and the volvo was less money........I guess what I'm saying is make sure your measurements are accurate before you buy.:greedy_dollars: and do lots of research...:beer-

          Comment


            #6
            OH and wait for it........................op

            the diesel ney sayers will arrive shortly LOL:box-

            Comment


              #7
              Ofishal wrote:
              OH and wait for it........................op

              the diesel ney sayers will arrive shortly LOL:box-
              I don't think any diesel nay sayers are going to pipe up.

              Probably because the OP indicated that he was trying to increase the range of his boat.

              Thats a very valid application for a diesel repower.

              KEVIN SANDERS
              4788 LISAS WAY - SEWARD ALASKA
              www.transferswitch4less.com

              Whats the weather like on our boat
              https://www.weatherlink.com/embeddab...59665f4e4/wide


              Where are we right now? https://maps.findmespot.com/s/36S4

              Comment


                #8
                johnrupp wrote:
                Stryc,

                You will probably have better luck posting your question on http://"http://www.boatdiesel.com" w...boatdiesel.com. It costs $25 a year but it is the best site for diesel power questions.
                +1. Boatdiesel.com has been a tremendous help for my Diesel repower. The people who visit that forum will know your engine better than anyone; and will be able to provide good guidance -- as many of the contributors perform repowers on a regular basis.

                Comment


                  #9
                  ksanders wrote:
                  I don't think any diesel nay sayers are going to pipe up.

                  Probably because the OP indicated that he was trying to increase the range of his boat.

                  Thats a very valid application for a diesel repower.
                  I don't think there area any Diesel naysayers on this forum. I have first hand knowledge of it. :kidding

                  Comment


                    #10
                    There are no diesel naysayers. I think almost everyone would love to have a boat with a diesel. I think there are diesel repower naysayers. Spending $15k to $20k on an old Bayliner to repower? I would saynay...


                    Comment


                      #11
                      trophyboat wrote:
                      There are no diesel naysayers. I think almost everyone would love to have a boat with a diesel. I think there are diesel repower naysayers. Spending $15k to $20k on an old Bayliner to repower? I would saynay...

                      I spent $25K to repower my 1999 2859 three years ago.

                      I used the boat for two good seasons after that then sold the boat for $50K last October after stripping out the electronics. I sold it in the fall (bad time to sell) to the second guy that looked at the boat.

                      He said the main reason he bought it was that it had a new engine that had a bumper to bumper Mercruiser warranty.

                      Did I loose money on the boat? Well of course, boats are not an investment. Did I get a reasonable return on my recent repower? Yes I did. For comparison my friends 2859 with a 1000 hour 7.4L and similar "extras" (but with a good electronics package) sold for $32K this spring.

                      KEVIN SANDERS
                      4788 LISAS WAY - SEWARD ALASKA
                      www.transferswitch4less.com

                      Whats the weather like on our boat
                      https://www.weatherlink.com/embeddab...59665f4e4/wide


                      Where are we right now? https://maps.findmespot.com/s/36S4

                      Comment


                        #12
                        Why did you spend $25k and then sell it after only two seasons?

                        Comment


                          #13
                          trophyboat wrote:
                          Why did you spend $25k and then sell it after only two seasons?
                          Because I bought a larger boat.

                          KEVIN SANDERS
                          4788 LISAS WAY - SEWARD ALASKA
                          www.transferswitch4less.com

                          Whats the weather like on our boat
                          https://www.weatherlink.com/embeddab...59665f4e4/wide


                          Where are we right now? https://maps.findmespot.com/s/36S4

                          Comment


                            #14
                            I have never done a re-power like this but I would say go with what gives the best power to weight ratio.
                            Phil, Vicky, Ashleigh & Sydney
                            1998 3055 Ciera
                            (yes, a 1998)
                            Previous boat: 1993 3055
                            Dream boat: 70' Azimut or Astondoa 72
                            Sea Doo XP
                            Sea Doo GTI SE
                            Life is short. Boats are cool.
                            The family that plays together stays together.
                            Vice Commodore: Bellevue Yacht Club

                            Comment


                              #15
                              trophyboat wrote:
                              Spending $15k to $20k on an old Bayliner to repower? I would saynay...

                              What I want to say is particularly useful to the OP, but applies to many people who have chosen to go through with a Diesel repower on an older boat. If I was to shop for a boat in the condition of my present boat, with all of its amenities, size, and layout, equipped with a Diesel engine, there is no way I could find a comparable boat for under $25K. Now equip that boat with a brand new Diesel engine, a new transom, new fuel, electrical, and mechanical systems, you are talking well over $25K. When all is said and done, I will have spent about $10K. This is way less than most Diesel repowers, but the same principle applies with more pricey Diesel engines. What Ofishal did is an example. From an economic standpoint, it's a no-brainer.

                              Comment

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