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Volvo Penta 3.0L

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  • #46
    Originally posted by AllDodge View Post
    Your checking to find out if the vanes have broke loose from the shaft. The pulley should not turn if the vanes are held

    Also look at the vanes to see if there is no damage
    Decided to recheck water flow at pump. Not much water is coming out. I think there should be at least as much water coming out as I put in. I did back flush it and water came out the back. Also pulled the hose that goes to the thermostat housing and no water came out from there when engin is running. Have not checked circulating pump yet because I suppose there needs to be water coming to it fo it to work. ???

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    • #47
      Originally posted by AllDodge View Post
      Remove the large hose going to it, and remove belt on pulley. Insert something into the vanes and try to hold it to see if pulley can be turned by hand, and look at all the vanes to see if they are there

      Without a thermostat or one which stays open it should run cooler
      Well had the boat working ok on muffs in the yard. Put in the water this weekend and it temp went up with in 5 minutes. So now I think that it's not pulling any water. On the muffs, the pressure probably kept the temp down. Any thoughts?

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      • #48
        Originally posted by mltessier View Post

        Well had the boat working ok on muffs in the yard. Put in the water this weekend and it temp went up with in 5 minutes. So now I think that it's not pulling any water. On the muffs, the pressure probably kept the temp down. Any thoughts?
        That would have me looking at the impeller and inlet fitting that Scott mentioned
        94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
        95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
        07 Seadoo GTX
        Merc Adults Only VP Adults Only
        G-Dad always said "First Liar doesn't stand a chance"

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        • #49
          Originally posted by AllDodge View Post

          That would have me looking at the impeller and inlet fitting that Scott mentioned
          Finally found the problem. The raw water pump was bad. Replaced it and all was good for the first 1 hour ride. Second ride that engine lost power a couple of times then overheated again. Started it back up after a while and it ran good for a couple minutes, then hesitated a couple of times and stalled but no overheat. Got the boat back to boat lift ok.
          My boat lift sits in very shallow water(working on extending the dock) and the second time we went out I think I might have pulled some junk from the bottom. Could that have caused the symptoms I described earlier?

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          • #50
            If stuff is being sucked up you can overheat. If there has been enough stuff sucked up, it can clog up the block
            94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
            95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
            07 Seadoo GTX
            Merc Adults Only VP Adults Only
            G-Dad always said "First Liar doesn't stand a chance"

            Comment


            • #51
              Originally posted by AllDodge View Post
              If stuff is being sucked up you can overheat. If there has been enough stuff sucked up, it can clog up the block
              Thanks for your help! What can be done to flush the block?

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              • #52
                Without pulling core/freeze plugs Not a whole lot. If drain plugs and their bushings can be removed to help flushing is about it that I am aware of
                94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                07 Seadoo GTX
                Merc Adults Only VP Adults Only
                G-Dad always said "First Liar doesn't stand a chance"

                Comment


                • #53
                  Originally posted by AllDodge View Post
                  Without pulling core/freeze plugs Not a whole lot. If drain plugs and their bushings can be removed to help flushing is about it that I am aware of
                  I had a local tech tech look at the engin. He did a couple of tests while on the boat lift. Water pump is pulling, no problem. After playing with the carb and looking he told me that there wasn't any gas getting to it (bowl would fill up and empty according to him, that was the source of the bogging down/stalling engin) so he had a look at the gas pump. Next step is to remove/replace/clean (maybe) the small filter in the pump.
                  I can understand that gas might not be going to the carb, but how would that cause an overheat? He seemed to think they where 2 separate issues. Also noticed a small leak on the power head indicating a bad head gasket. Ideas/input?

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                  • #54
                    Also noticed a small leak on the power head indicating a bad head gasket. Ideas/input?
                    Head leak, that will can cause an overheat
                    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                    07 Seadoo GTX
                    Merc Adults Only VP Adults Only
                    G-Dad always said "First Liar doesn't stand a chance"

                    Comment


                    • #55
                      Originally posted by AllDodge View Post

                      Head leak, that will can cause an overheat
                      Thanks for your input. In that case would an overheat situation happen all the time? I've driven the boat on a couple of separate occasions and the engin did not overheat.

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                      • #56
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                        If there is crd in the block some may get washed out and no overheat, the

                        did you ever check the raw water inlet fitting on the outdrive?
                        inlet fitting is smaller and can get clogged easier, so that can cause the issue. It can clog enough to increase heat and unclog a bit so it doesn't.

                        Did you ever check it?
                        94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
                        95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
                        07 Seadoo GTX
                        Merc Adults Only VP Adults Only
                        G-Dad always said "First Liar doesn't stand a chance"

                        Comment

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