Engine overheated, operator's error

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  • waterlogged882
    MC Master Poster
    • Dec 2004
    • 16596

    #16
    Originally posted by avorob View Post
    That sounds like a plan. Thank you.
    Question, where do I buy the hoses (moded or at least how the hoses look like).
    I see AMZN sells impellers StayCoolPumps Impeller Kit Replaces Johnson 09-812B-1 Jabsco 13554-0001-P Sierra 18-3306
    is this the right model? Johnson 09-812B-1
    Ill watch the oil as well.
    Look at discount inboard marine. Also first choice marine and ebasic power.

    Amazon sells some gray market impellers. Get the better selection.
    93 190
    (safe click)
    John 14:6
    (safe click)

    Comment

    • 1redTA
      MC Devotee
      • Aug 2009
      • 1732

      #17
      yep, more than an impeller
      1981 MasterCraft
      19' Skier 351W PowerSlot
      Long gone is the Trans AM waiting for another

      Comment

      • avorob
        TT Enthusiast
        • Jun 2012
        • 145

        #18
        Tried running the engine after the overheat

        Just tried to run the engine on idle. This time I opened the intake valve. LOL
        It went over 160 deg and I shot it down.
        While the warming up phase the smoke was coming from the exhaust and the plastic 90 deg elbow. See the picks.
        The smell was different than the burning more like the material is burning.
        The oil pressure was at 40+ PSI. The oil was clean. However, if the impeller is not pumping the water is not circulating and it will be now water penetration if the gasket was burned?

        What should i try next?
        Attached Files

        Comment

        • waterlogged882
          MC Master Poster
          • Dec 2004
          • 16596

          #19
          Run it with a new impeller. No impeller means no water for cooling. You have two water pumps; 1) a raw water pump and, 2) an engine circulating water pump. For now, the raw water pump is the one to get a new impeller in. Even if it looks good, replace it.

          Water will not get in the oil through a degradated head gasket until it circulates through the engine cooling path.

          Get it back to running and use it for a short while. Check the oil. The things you have said so far make me lean toward less damage. You may get lucky. White smoke is steam.

          The smell is likely hose material.

          One thing about it now, the engine is not seized. 160 deg. F is normal operating temperature (NOT).
          Last edited by waterlogged882; 04-29-2018, 08:54 PM.
          93 190
          (safe click)
          John 14:6
          (safe click)

          Comment

          • avorob
            TT Enthusiast
            • Jun 2012
            • 145

            #20
            Diagnostics. Step One. Bad Impeller

            The impeller went bad. See the pick
            Where should I check /fish for broken off pieces?
            Attached Files

            Comment

            • Lars
              MC Fanatic
              • Jul 2009
              • 526

              #21
              Check the transmission cooler, in my 197 its the first thing after the raw water pump and there's a strainer in it, pull the water hoses off and see if you can clear out any debris.

              Comment

              • CantRepeat
                • Jul 2008
                • 16639

                #22
                You might have melted the inside of the muffler(s) as well.
                -Tim

                Making boomers great again!! Boomin'

                Comment

                • lentiman
                  TT Enthusiast
                  • Sep 2011
                  • 368

                  #23
                  Even with the fresh water turned off, that impeller didn't just suddenly fail to that extent. I'll pull and check all the hoses and remove and check the mufflers before putting that back in the water.

                  Comment

                  • waterlogged882
                    MC Master Poster
                    • Dec 2004
                    • 16596

                    #24
                    All good advice above. I'd not go tearing into things (with gaskets...thermostat housing, etc.) until you put the impeller in and see if it cools properly. If it does, likely the pieces have already gone through. You put a hell of a strain on the entire system, so I doubt the impeller pieces are wedged. $0.02

                    When I melted down the one I showed you earlier, I found a large chunk of the internal wall of the exhaust hose stuck in the muffler between the baffles. Certainly take it apart and check all possibilities.

                    Listen to the advice of the others here about the other components.

                    I can almost 100% guarantee your exhaust hoses are ruined. I highly recommend replacing them, regardless.


                    .
                    93 190
                    (safe click)
                    John 14:6
                    (safe click)

                    Comment

                    • avorob
                      TT Enthusiast
                      • Jun 2012
                      • 145

                      #25
                      Originally posted by waterlogged882 View Post
                      Change the hoses.........or not... your call. I would minimum change hoses (no chance of flow restriction or back flow from an internal pocket), change the impeller, and look at the oil for signs of water intrusion (head gasket deteriorated). The oil should be clean looking, no water mixed (a milky look) or a scorched smell. Change the oil regardless but pay attention to what the current oil looks and smells like.

                      .
                      Originally posted by Lars View Post
                      Check the transmission cooler, in my 197 its the first thing after the raw water pump and there's a strainer in it, pull the water hoses off and see if you can clear out any debris.
                      How do I find the trans cooler?

                      Comment

                      • avorob
                        TT Enthusiast
                        • Jun 2012
                        • 145

                        #26
                        Originally posted by waterlogged882 View Post
                        I can almost 100% guarantee your exhaust hoses are ruined. I highly recommend replacing them, regardless.
                        .
                        How do exhaust hoses look like? The ones with 90 deg bend?

                        Comment

                        • lentiman
                          TT Enthusiast
                          • Sep 2011
                          • 368

                          #27
                          If you were in my area I'd help you out. Perhaps you can find a local TT member that can lend a hand.

                          Comment

                          • CantRepeat
                            • Jul 2008
                            • 16639

                            #28
                            Originally posted by avorob View Post
                            How do exhaust hoses look like? The ones with 90 deg bend?
                            Look at the photo in this thread.



                            On the end of the exhaust manifold is part of an exhaust hose. The hose you see will connect to the muffler and then there will be two more hose that look like that one that go from the muffler to the transom of the boat.
                            -Tim

                            Making boomers great again!! Boomin'

                            Comment

                            • avorob
                              TT Enthusiast
                              • Jun 2012
                              • 145

                              #29
                              Originally posted by CantRepeat View Post
                              Look at the photo in this thread.



                              On the end of the exhaust manifold is part of an exhaust hose. The hose you see will connect to the muffler and then there will be two more hose that look like that one that go from the muffler to the transom of the boat.
                              Replace the two straight and two 90 deg rubber hoses on the pix?
                              Buy on Discount Inboard Marine?
                              No need to worry about the fiberglass muffler?
                              Attached Files

                              Comment

                              • CantRepeat
                                • Jul 2008
                                • 16639

                                #30
                                Yes, those are the hoses. I would check the inside of the muffler while you have it all apart.

                                The green area got extremely hot and probably will de-laminate. The blue are got hot enough to burn the paint off of the muffler.
                                Attached Files
                                Last edited by CantRepeat; 05-02-2018, 04:51 PM.
                                -Tim

                                Making boomers great again!! Boomin'

                                Comment

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