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Fuel Pumps Are they Same?

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  • Fuel Pumps Are they Same?

    I have a 1997 Four Winns with a 5.7L Volvo Penta Motor in it. I have 2 Fuel Pumps on the motor. One on the front left side of the motor that has the Water Seperator Filter attached to the housing.

    The Second Filter is on the top back of the motor same left side of the motor. The Pumps look identical minus the brackets.

    I have been told the one in fron is a Low Pressure Pump and the one in back is a High Pressure Pump. Looking up the pumps on Iboats i only see one pump listed as a replacement for both.

    How could one pump be a loq pressure and a high pressure pump at the same time? Are they actually the same part number for both?


  • #2
    Re: Fuel Pumps Are they Same?

    Not the same, the front one is a low pressure pump and the one on the VST is a high pressure pump.
    You have to look up the parts using the proper FULL model number of your engine. It's not a hit and miss option.
    Don S.

    sigpic

    Please, no PM's (Private Messages) regarding boat/engine problems.
    That is what the forums are for.
    Only forum/moderator issues will be answered in PM's.

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    • #3
      Re: Fuel Pumps Are they Same?

      Hi Don, thanks for the reply.

      I have the following motor. Unless I'm searching wrong iboats parts only show one pump. Do you by chance know what the two different part numbers are, do you

      For: 5.7GLPLKD

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      • #4
        Re: Fuel Pumps Are they Same?

        I had to replace mine last year. The high and low pressure pumps, and fuel/water separater are one assembly, at least on mine. Volvo's pretty proud of them, too. best price I found on line was About $640. Dealer had them for over $800. If either one is going bad, it will usually have a whine to it while running. The good news is it takes only about 15 minutes to change out. Hope this helps.

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        • #5
          Re: Fuel Pumps Are they Same?

          Yeah I have two one connected to the fuel separator and the other on top back of the motor.

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          • #6
            Re: Fuel Pumps Are they Same?

            I would love to see a picture of these 2 pumps. If yours is a carbed engine(is it?), it should only have 1.
            1998 Wellcraft Eclipse 24 Cuddy
            Volvo Penta Duo-Prop 7.4L "LK"

            2006 Sun Tracker Party Barge 21
            Mercury 90 4-Stroke FI
            "Common sense is not very common"
            "Failing to prepare is preparing to fail." -- John Wooden

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            • #7
              Re: Fuel Pumps Are they Same?

              With a model number of 5.7GLPLKD you have a carbed engine and only 1 fuel pump. Low pressure. You would have to have a fuel injected engine (TBI) to have two pumps. If you do have 2 pumps, then you need to post a picture of your engine. Because it is not carbed.
              Don S.

              sigpic

              Please, no PM's (Private Messages) regarding boat/engine problems.
              That is what the forums are for.
              Only forum/moderator issues will be answered in PM's.

              Comment



              • #8
                Re: Fuel Pumps Are they Same?

                Here is an exact diagram of my Fuel system. I difinetly have a MPI system and not a Carbuerator. According to the stickers that were on the engine that is model i have.

                Click image for larger version

Name:	b8f7357202ab1883a4303db80d5f5dc5.jpg
Views:	1
Size:	107.0 KB
ID:	126625

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                • #9
                  Re: Fuel Pumps Are they Same?

                  I difinetly have a MPI system and not a Carbuerator.
                  No, you have a TBI (Throttle Body Injection) system, not MPI (Multi Port Injection)

                  You need to check your model number then, see of it says Gi instead of GL without the i in there somewhere, the model number says carbed.

                  Have a look at page two of this service bulletin.

                  Click image for larger version

Name:	5eab5f5d91a495c542a5ce70ef159478.pdf
Views:	1
Size:	21.6 KB
ID:	126628
                  Don S.

                  sigpic

                  Please, no PM's (Private Messages) regarding boat/engine problems.
                  That is what the forums are for.
                  Only forum/moderator issues will be answered in PM's.

                  Comment



                  • #10
                    Re: Fuel Pumps Are they Same?

                    Yes, once again you are correct, it is a TBI. I will see if it is a GI or GL.



                    Originally posted by Don S View Post
                    No, you have a TBI (Throttle Body Injection) system, not MPI (Multi Port Injection)

                    You need to check your model number then, see of it says Gi instead of GL without the i in there somewhere, the model number says carbed.

                    Have a look at page two of this service bulletin.

                    Click image for larger version

Name:	5eab5f5d91a495c542a5ce70ef159478.pdf
Views:	1
Size:	21.6 KB
ID:	126628

                    Comment

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