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    160 THERMOSTATS-gctid808379

    Has anyone ever used a automobile 160 degree thermostat on there boat ? I have the 5.7 carb bravo 2 motors & been using automobile stats for some time now but change them every year & am able to reuse the same original gaskets for a few years before changing them. The price difference in stats is significant

    #2
    I believe its 140 for marine/brackish water and you can use 160 for fresh water only.
    Pat. Sandpoint Ida
    I NEED ANOTHER BOAT!!

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      #3
      I don't think it matters what water your boating in it's the engine specifications on what degree thermostat you need mine calls for a 160

      Comment


        #4
        It does matter.

        At 160 salt water/brackish water starts to form mineralization in your block and manifolds.
        Pat. Sandpoint Ida
        I NEED ANOTHER BOAT!!

        Comment


          #5
          Raw water cooled engine 140, closed cooled engine 160
          Dave
          Edmonds, WA
          "THE FIX"
          '93 2556
          Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

          The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
          Misc. projects thread
          https://www.baylinerownersclub.org/f...56-gctid789773

          Comment


            #6
            "builderdude" post=808487 wrote:
            ......closed cooled engine 160
            Oh my! 160. Is there a danger of using anything higher? I replaced mine, but I don't recall what I replaced with. Possibly a 175. It was running around 200 before I changed it, and now I'm in the 170's. Does that mean salt crystals in the heat exchanger?
            "B on D C", is a 1989 2459 Trophy Offshore HT, OMC 5.7L, Cobra OD, Yamaha 15hp kicker. Lots of toys! I'm no mechanic, just a blue water sailer and woodworker who loves deep sea fishing.
            MMSI: 367637220
            HAM: KE7TTR
            TDI tech diver
            BoD Puget Sound Anglers North Olympic Peninsula Chapter
            Kevin

            Comment


              #7
              I run at 170 (at gauges) with a 160 t stat. You probably have a 160 in there.
              Dave
              Edmonds, WA
              "THE FIX"
              '93 2556
              Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

              The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
              Misc. projects thread
              https://www.baylinerownersclub.org/f...56-gctid789773

              Comment


                #8
                As a general rule:

                Closed Cooling System = 160* and will run at/near 170* - 180*

                Open system in river/lake water = 160* unless the ECU/ECM calls for a 140* max

                Open system in ocean water = 140* due to salt crystallization that may occur at/near this temp.

                The automotive stat is ok when used in a closed cooling system.

                Some open system applications call for the SS Marine version.

                .
                Rick E. Gresham, Oregon
                2850 Bounty Sedan Flybridge model
                Twin 280 HP 5.7's w/ Closed Cooling
                Volvo Penta DuoProp Drives
                Kohler 4 CZ Gen Set

                Comment


                  #9
                  I have heard that logic before of using a 140 stat in salt ocean waters raw water cooling system. My book says to use a 160. And I'm pretty sure the engineers who went to school for x amount of years might be correct....just saying

                  Comment


                    #10
                    Thermostat 'rating' is the temperature at which they will start to open

                    http://www.stant.com/index.php/engli...s-thermostats/

                    Comment


                      #11
                      "bucluv" post=809380 wrote:
                      I have heard that logic before of using a 140 stat in salt ocean waters raw water cooling system. My book says to use a 160. And I'm pretty sure the engineers who went to school for x amount of years might be correct....just saying
                      [color]blue wrote:
                      No offense...... but are you apposed to questioning the engineers who wrote the book... or better yet, the staff who edited the writing prior to publication?

                      Ocean water (salt water) begins to crystalize against cast iron components at temps exceeding 140*.

                      Salt crystalization can become very problematic years down the road.

                      Your call! [/color]
                      Rick E. Gresham, Oregon
                      2850 Bounty Sedan Flybridge model
                      Twin 280 HP 5.7's w/ Closed Cooling
                      Volvo Penta DuoProp Drives
                      Kohler 4 CZ Gen Set

                      Comment


                        #12
                        No offense taken. ; ) I also hear some people say in the summertime they run without a thermostat I don't think that is good practice at all. Maybe I'll try the 1:40 stats is it better for your engines to run cooler like that?

                        Comment


                          #13
                          "bucluv" post=809459 wrote:
                          No offense taken. ; ) I also hear some people say in the summertime they run without a thermostat I don't think that is good practice at all. Maybe I'll try the 1:40 stats is it better for your engines to run cooler like that?
                          [color]blue wrote:
                          Several years ago, we had one member who claimed that one of his engines (in a Sea Ray) came from the factory without a thermostat. Most of us thought that he had to have been mistaken.

                          Engineers have determined that our typical Marine engines operate more efficiently at/near the 160*/180* mark.

                          Even the salt water engines operate better if the temps are at/near 160*/180*.... BUT, in order to avoid the salt crystallization, they bring the temps back down to the 140* ish range!

                          [/color]
                          Rick E. Gresham, Oregon
                          2850 Bounty Sedan Flybridge model
                          Twin 280 HP 5.7's w/ Closed Cooling
                          Volvo Penta DuoProp Drives
                          Kohler 4 CZ Gen Set

                          Comment

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