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Replacing Mercruiser Water Pick Up Hose

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  • Replacing Mercruiser Water Pick Up Hose

    Mercruiser 1998 V8 5.0 - I want to replace the water pick up hose on my mercruiser - can someone point me to a picture where this is located or tell me? Is this something that is easy to do - eg, I am not a mercruiser mechanic just a regular guy with basic mechanical skills.


  • #2
    Re: Replacing Mercruiser Water Pick Up Hose

    The OEM service manual for your particular drive details how to change it, but I really have to ask WHY you want to change it when you don't even know what it is or where it's located? Also, what kind of outdrive is it?
    There are OEM service manuals for download at the link below
    http://forums.iboats.com/showthread.php?t=251571
    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: Replacing Mercruiser Water Pick Up Hose

      I could not find the manual for the alpha one engine itself 1998, only one for the outdrive/transom. Do you have a specific link to the manual for me?

      It was recommended on this forum that to correct a high temp problem at slow trolling speeds to replace the water pick up hose which tends to kink over time, and to replace the elbows/risers. Already replaced the impellor.

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      • #4
        Re: Replacing Mercruiser Water Pick Up Hose

        It was recommended on this forum that to correct a high temp problem at slow trolling speeds to replace the water pick up hose which tends to kink over time, and to replace the elbows/risers. Already replaced the impellor.
        You don't seem to quite understand the concept. This forum makes all kinds of suggestions, some are right some are wrong. What you have to do is find out exactly what is wrong with your engine and drive and not fix what is wrong with others. All that does is costs you a lot of money for replacing parts that aren't the problem.

        As far as engine manual, well, that depends on what engine you have.
        You might want to read this thread before you go any further.
        http://forums.iboats.com/showthread.php?t=220416
        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



        • #5
          Re: Replacing Mercruiser Water Pick Up Hose

          Originally posted by scottyt22 View Post
          I could not find the manual for the alpha one engine itself 1998, only one for the outdrive/transom. Do you have a specific link to the manual for me?
          Alpha-1 is the outdrive (part hanging off back of the boat)

          You engine (part inside boat) can be various different models. 3.0 liter inline 4, 4.3 liter V-6, 5.0 or 5.7 liter V-8's.

          There is a water hose in the transom assembly for the Apha-1 Outdrive. You will also have water hoses inside the boat, the locations and function depends on the engine you have and if it is freshwater cooled or raw water cooled.
          20' Suntracker Pontoon

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          • #6
            Re: Replacing Mercruiser Water Pick Up Hose

            My engine is a 5.0. I called Mercruiser and here is the water pick up hose part number: 32-96246A4. Now friends, back to my question, does anyone have a picture of where this hose is located? It supposadly connects from the main engine to the transome.

            Comment



            • #7
              Re: Replacing Mercruiser Water Pick Up Hose

              Since you just want to throw parts at it instead of diagnosing, my suggestion would be to go out to the boat and look in the transom assebly.
              The last time religion controlled the world it was known as the Dark Ages

              Comment



              • #8
                Re: Replacing Mercruiser Water Pick Up Hose

                It is pictured in the alpha 1 documentation. It goes from the forward facing inside of the drive to a barbed fitting on the transom assembly. It is a huge pain in the derriere to do the 1st time. I know... I changed the one on my 89 last year due to cracks and kinks. I wrestled with that thing for a while. It might have been harder for me though because I have oversized hands. The hose length is very important to keep it the correct shape.
                But even more important is the advice you already received.
                If you go through the diagnostic process you may be able to save hours of time.
                The hose is nothing more than good quality automotive heater hose, it is no high tech stuff. It's just a tough piece to install.

                Your smart move is to go the the adults only section in "Mercruiser & other I/O engines and drives" where you can get a link to a free download of the alpha 1 manual from Mercruiser. It goes into every possible detail. Including a process you can follow pretty easily to confirm water flow using a clear hose.
                1989 Baja Sunsport 196, Mercruiser 5.7, Alpha 1
                Moultonborough Neck, Lake Winnipesaukee, NH

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                • #9
                  Re: Replacing Mercruiser Water Pick Up Hose

                  have a good look on you ;www.youtube.com ,mercruiser and most engines are shown in picture form and general maintenance procedures with video capture.will be helpful for most basic maintenance.
                  if your having trouble cooling engine unless your pipe has a gaping hole in it, the trouble probably lies at the impellor in lower leg hanging out the back of your boat. find your problem first then ask for further help.

                  Comment



                  • #10
                    Re: Replacing Mercruiser Water Pick Up Hose

                    Well I just bought the various parts and here is what I'm going to do - I'll let everyone know how it turns out. I will replace all the water hoses because I don't think they have every been replaced since 1994. Going to replace the thermostadt. Going to replace the Riser gaskets.

                    Comment



                    • #11
                      Re: Replacing Mercruiser Water Pick Up Hose

                      how was the impeller when you replaced it, was missing any parts, what about the thermostat housing and the termostat, like they say just dont trow parts, you probably will keep having the same problem...

                      Comment



                      • #12
                        Re: Replacing Mercruiser Water Pick Up Hose

                        What issue are you having that points you to the pickup hose? Is it visually leaking/pouring water from it while running on the muffs? On an Alpha 1 Gen1 it runs around the left side of the gimbal ring, tight against the transom housing.
                        1978 Glastron/Carlson CV23
                        429/Berkeley JE

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                        • #13
                          Re: Replacing Mercruiser Water Pick Up Hose

                          Here are the results - I replaced the old thermostadt and all the water hoses. The risers and gaskets seemed fine - no leakage and no dirty discharge when the hoses were removed - so left them alone. Put the old thermostadt in hot water and it never opened up.

                          Anyway, took the boat out and at very slow trolling speeds it stayed cool most of the time. It did still heat up to 200 degrees every once in a while, but cooled down quicker and stayed cool longer, when I reved the engine up in neutral or went faster. So still not perfect.

                          So you can see that the engine still seems to be heating up more than it should. Someone mentioned that the radiator hot water sensor may be bad, so I'm going to replace that next and see what happens.

                          Comment



                          • #14
                            Re: Replacing Mercruiser Water Pick Up Hose

                            The risers and gaskets seemed fine - no leakage and no dirty discharge when the hoses were removed - so left them alone.
                            Ayuh,... If you don't pull the Risers, you can't see how Plugged up they are....
                            Any Grease is Better,..... Than No Grease at All.......

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                            • #15
                              Re: Replacing Mercruiser Water Pick Up Hose

                              I did pull one of the Risers, clean as a whistle.

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