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2007 Volvo Penta 5.7GI Mated to 280DP

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  • 2007 Volvo Penta 5.7GI Mated to 280DP

    I picked up a 2007 volvo penta 5.7 GI complete. I plan on installing in a 1976 Bayliner Victoria with a 280DP. It is replacing a 305.
    Has any one done this? Will the mate up? do I use the flywheel etc from the 305? How about the wiring and controls, shiftier throttle etc. How about the wiring on the 5.7. The 5.7 is complete with wiring fuel pumps etc. It come from a custom wooden boat made locally for a resort. They are re-powering. It has 5.000 hours but does not burn oil and runs good. I may freshen-up with new rings etc. Any information would be appreciated.

  • #2
    welcome aboard

    your new to you 2007 motor would have a 168 tooth flywheel. only the 153 tooth flywheel will fit the AQ PDS housing. you will need to buy a new flywheel as your original flywheel was for a 2-piece RMS crank and the new motor is a 1-piece RMS crank. its simply a GM 10.5" manual clutch flywheel. available for about $75

    you will need to make an adapter harness, however that is easy. mainly because your old motor would have had the trapezoidal plug and the new motor will be a round plug. you can look, they may make adapter harnesses.

    as for the boat. is the 5.0 hours or 5000 hours? at 5000 hours, the motor would need to be pulled apart, and you may need to completely re-build. a compression reading as well as pulling the heads to inspect the bores would be my first suggestion.

    you will need to find a custom hose from the power steering cooler to the raw water pump
    Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

    1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

    Past Boats
    1970 Wooster Hellion - Merc 9.8
    2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
    1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

    What’s behind you doesn’t matter.Enzo Ferrari

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    • #3
      I have both flywheels and bell housings. neither will work? .
      Will the old starter work with the 153 tooth flywheel?

      Will the adapter harness power up the motor and shift safety switch (Every thing to run the newer motor.) It can't be that easy.

      5k hours is correct. I am told it ran great. I fully intended the rebuild it BUT asking around these 5.7s don't seem to have a catastrophic failure point.(I"m a life long ford guy don't know the Chevy's). The pvc valve is clean (no blow by). The outside is oil free-Except where its been spilled when changing. The oil is not dark. Thinking Compression test & run on the stand. If its looks good just run it. I don't put many hours on anyway. I run the kicker when fishing.

      Neither the motor nor boat have power steering.

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      • #4
        It came from a water taxi at a resort. made short trips.

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        • #5
          Originally posted by jaytintinger@q.com View Post
          I have both flywheels and bell housings. neither will work? .
          Will the old starter work with the 153 tooth flywheel?

          Will the adapter harness power up the motor and shift safety switch (Every thing to run the newer motor.) It can't be that easy.

          5k hours is correct. I am told it ran great. I fully intended the rebuild it BUT asking around these 5.7s don't seem to have a catastrophic failure point.(I"m a life long ford guy don't know the Chevy's). The pvc valve is clean (no blow by). The outside is oil free-Except where its been spilled when changing. The oil is not dark. Thinking Compression test & run on the stand. If its looks good just run it. I don't put many hours on anyway. I run the kicker when fishing.

          Neither the motor nor boat have power steering.
          No, your new motor came with a 168tooth flywheel and is for a 1-piece RMS crank.
          your old motor came with a 153 tooth flywheel, however is for a 2-piece RMS crank
          only the PDS housing maters as that is what your drive connects to
          you need a new flywheel with 153 teeth for a 1-piece RMS crank.

          you could use your old starter, however why. the new PMGR starters are 1/3 the weight.

          rebuild time for a motor in a boat is usually 3000 hours. so at 5000 hours, it may be on its last leg.
          Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

          1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

          Past Boats
          1970 Wooster Hellion - Merc 9.8
          2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
          1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

          What’s behind you doesn’t matter.Enzo Ferrari

          Comment


          • #6
            Your right. wishful belief in the boat motor fairy How about the electrical. Is it plug and play with the plug adapter?

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            • #7
              The wiring on most boats is color coded.
              If the plugs don't match use soldered connections.


              Buy American made Cars and Trucks!!!Towing insurance for a boat,a GREAT thing.
              ​Tools to make my life easier: Battery tester, die grinder, temp.gun, compression tester, DVA meter.

              In Scenic , Beautiful San Sebastian by the sea Florida

              88 Bayliner 21CC 2001 Mercury 225 HP EFI

              Comment


              • #8
                Originally posted by jaytintinger@q.com View Post
                Your right. wishful belief in the boat motor fairy How about the electrical. Is it plug and play with the plug adapter?
                yes. the generic 8-pin harness connector running to the helm is universal. the adapter harness at the engine (about 2 feet long) is what changes to the trapezoidal plug or the round plug.

                however as Jerry mentioned, the wiring colors/functions are STANDARD across the board.

                connect
                red to red (unswitched power)
                black to black (ground)
                tan to tan (water temp)
                grey to grey (tach)
                light blue to light blue (oil pressure)
                yellow with red stripe to yellow with red stripe (start)
                purple to purple (ignition)

                and if you have it
                orange to orange (post switch power or alternator power)
                Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

                1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

                Past Boats
                1970 Wooster Hellion - Merc 9.8
                2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
                1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                What’s behind you doesn’t matter.Enzo Ferrari

                Comment


                • #9
                  Props change will be likely too. Loads more power there, should you get it all mated up. Not sure what’s on the drive now, maybe B3’s or B4’s ? Likely need B5’s at least.

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                  • #10
                    I figured as much on the props. It had B5's and I traded for B3's to try to get some performance out of that 305. No doubt I will need to go back the other way.

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                    • #11
                      what needs to come apart in order to pull the motor. Obviously the motormounts but does the out drive need to come off. or does it just slip out of the splines? What all should I replace? Bellows & u joints. what bearings and seals are there?

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                      • #12
                        After removing the engine’s water, exhaust and electrical,fuel and throttle cable and you just want to pull the motor unbolt the bellhousing at the rear of the engine. Remove the dust shield and the 6 bolts.
                        To remove the whole assembly remove the 2 socket head bolts in the helmet, use a 1/4” 20 bolt to back out the stainless fitting, the rear shift linkage cover, disconnect the shift rod, the 2 socket head rear bolts, the 2 hex nuts and the worm clamp on the bellows then the forward clamp. Pull the bellows back. Lift and rotate the upper gear housing and pull it back. The 6 hex bolts that hold the conical ring are next then lift the engine slightly. You can use 2 of the long bolts that held the ring to back the ring out by screwing them into the tapped holes in the ring. Remove the conical ring then pull the engine.
                        All of this gets real complicated if any of the shaft splines are rusted together. Trust me I have been ther several times and it is a real PITA!
                        Kenner, Louisiana 1980 Donzi 18'. 2+3 6.2 MPI Alpha 1

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                        • #13
                          Pull drive
                          undo 6 bolts on PDS clamp,, use the bolts in the 3 tapped holes to drive it off
                          Undo the exhaust hoses
                          Undo the throttle cable
                          Undo the battery cables and cround cables
                          undo the harness connection
                          Undo the fuel hose and plug
                          Unbolt the front mounts

                          Lift motor slightly, then move forward to clear PDS from transom shield, then lift out of bilge
                          Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

                          1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

                          Past Boats
                          1970 Wooster Hellion - Merc 9.8
                          2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
                          1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                          What’s behind you doesn’t matter.Enzo Ferrari

                          Comment


                          • #14
                            Thanks that's a huge help. I will let you know how it goes.
                            here is the link to the boat.
                            ​​​​​​​ 1976 Bayliner Victoria 2750 double cabin express project

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                            • #15
                              Sign up today
                              Where would one go for the harness adapter?

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