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where to install water pressure gauge?

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  • where to install water pressure gauge?

    I have a 4.3 in a 1999 stingray. I wish to plug in a water pressure gauge but not sure where to plug the thing in at. I have a spare port on the thermostat housing. Will this work? I have looked at the block and head and there is nothing. There are a couple of plugged ports on the intake but I don't know what they will go to.


  • #2
    Re: where to install water pressure gauge?

    .....perhaps we could offer a suggestion or two, but first......

    Why would you want to install a water pressure gauge??? And, to measure what? Cooling water pressure? Internal block pressure?
    Eddie Petty. #3 Dirt Modified
    Courtland, Virginia
    V-20 Wellcraft
    3.7 470 Mercruiser

    Stumpnocker
    25 Yamaha, 25 Johnson, 25 Evinrude, 9.9 Evinrude, 4 Johnson, 2.5 Johnson

    Comment



    • #3
      Re: where to install water pressure gauge?

      I was told by some other boaters that a water pressure gauge is a good idea in that it helps monitor the condition of your water pump in the outdrive. As the pump starts to deteriorate, the gauge will start to show a decrease in pressure. Something to compare the water temp with I guess. It's a new boat to me, I am going to replace the pump in the spring just as general maintenance (I know you should change them every two or three seasons and I don't know anything about the history of the boat). An extra gauge to help prevent something catostrophic always sounds like a good idea to me.

      Comment



      • #4
        Re: where to install water pressure gauge?

        Why would you want a water pressure gauge? If you don't have water you will know it from the water temp.
        83 Sunrunner 16.5 120 merc Alpha 1 drive SOLD 8/1/13

        1996 Crownline 202BR
        5.7l EFI 0f791070
        Bravo I drive

        Comment



        • #5
          Re: where to install water pressure gauge?

          Read the above. I believe we were typing at the same time.

          Comment



          • #6
            Re: where to install water pressure gauge?

            ...I can appreciate your concern but don't really see the need.

            As previously stated, your temperature gauge/alarm will notify you.

            If you insist on the insurance factor, a flow gauge would be more appropriate than a pressure gauge as the volume of the cooling water is more important than its pressure (though a high pressure reading may indicate an upsteam restriction)
            Eddie Petty. #3 Dirt Modified
            Courtland, Virginia
            V-20 Wellcraft
            3.7 470 Mercruiser

            Stumpnocker
            25 Yamaha, 25 Johnson, 25 Evinrude, 9.9 Evinrude, 4 Johnson, 2.5 Johnson

            Comment



            • #7
              Re: where to install water pressure gauge?

              I was told by some other boaters that a water pressure gauge is a good idea in that it helps monitor the condition of your water pump in the outdrive
              I have been told by some that if you cant spot the sucker at the table that its probably you.

              Did you happen to see your buddies water pressure gauges by chance?

              They didn't tell you that your muffler bearings were bad and that you headlight fluid was low did they???

              Just change your impeller regularly and just go boating...
              sigpic

              1969 StarCraft Chieftain, 4.3 Mercruiser Alpha One Gen II

              Link To Restoration Page


              ----------------------------------------------------

              Its What I Don't Say You Should Be Worried About...

              Comment



              • #8
                Re: where to install water pressure gauge?

                some outboards have water pressure guages

                some newer mercruiser water pumps have water pressure switches that give a warning tone when water pressure drops below a certain threshold

                my experience with anything is: if you want it, the only limit is your pocketbook

                if you want the peace of mind of knowing your water pressure - install everything you need for it/have it done, either way it will be a small boost for the economy
                Sometimes when people try to save a penny, they end up spending a dollar

                It is best to fully understand how to properly operate, inspect, troubleshoot and repair your equipment

                Comment



                • #9
                  Re: where to install water pressure gauge?

                  ok. Thanks for all the opinions...again, can anyone answer my question?

                  Comment



                  • #10
                    Re: where to install water pressure gauge?

                    .....in one of the hardest to reach places there is a cooling water supply hose more-or -less centered in the lower transom beneath and behind the engine.

                    Not being completely familiar with the plumbing arrangement of your boat, follow the hose off the hull barb and mount your instrument in a convient location. This will give you cooling water inlet conditions.
                    Eddie Petty. #3 Dirt Modified
                    Courtland, Virginia
                    V-20 Wellcraft
                    3.7 470 Mercruiser

                    Stumpnocker
                    25 Yamaha, 25 Johnson, 25 Evinrude, 9.9 Evinrude, 4 Johnson, 2.5 Johnson

                    Comment



                    • #11
                      Re: where to install water pressure gauge?

                      Impeller should be changed every 2 years or LESS not 2 or 3. If you have just bought the boat and do not know the condition of the impeller CHANGE IT. Don't rely on some gauge that can be affected by debris or restrictions.
                      When will people learn that impellers require regular
                      replacement and are not drive it till it pukes items?

                      1984 Regal Medallion 195
                      3.8 V-6 with the dreaded
                      OMC Stringer Drive.
                      2003 Avalanche w/Hypertech

                      If it ain't fixable - don't break it!

                      Comment



                      • #12
                        Re: where to install water pressure gauge?

                        Originally posted by cr2k View Post
                        Impeller should be changed every 2 years or LESS not 2 or 3. If you have just bought the boat and do not know the condition of the impeller CHANGE IT. Don't rely on some gauge that can be affected by debris or restrictions.
                        I changed mine after 3.5 years and it was still in perfect shape. We only get about 15-20 hours a year so will stick with the 3 year change.
                        83 Sunrunner 16.5 120 merc Alpha 1 drive SOLD 8/1/13

                        1996 Crownline 202BR
                        5.7l EFI 0f791070
                        Bravo I drive

                        Comment



                        • #13
                          Re: where to install water pressure gauge?

                          Originally posted by trooperjim View Post
                          ok. Thanks for all the opinions...again, can anyone answer my question?
                          When it comes to water pressure gauges fitted to marine engines is a great option.
                          I have picked up cabage weed 3 times and spotted water pressure drop, stopped and reversed up, got pressure back and back on my way before the alarm has come on.

                          I know a guy that cooked his Mercruiser, cause he left the ear muffs on, if he had a pressure gauge and alarm system, he may have saved it.

                          trooperjim
                          I have fitted one to a 5.7 Alpha one thermo housing spare port.
                          Pressures vary from 5 - 6 psi depending weather the thermostat is opened or not.
                          Mercruiser do a kit.
                          I don't know what all the fuss is about, I always ckeck it when firing the engine up
                          Just ask if you want anymore info

                          Comment



                          • #14
                            Re: where to install water pressure gauge?

                            I have done the same Im with Moggy on this one for peace of mind go for it:

                            Comment



                            • #15
                              Re: where to install water pressure gauge?

                              I like the idea, can't have too many functional guages, although you do have an engine temp guage all it tells you is your overheating, it doesn't know if the t-stat is faulty or a hose is pinched collapsed, circulating pump trouble ect.
                              but like Ediiepetty said you have to pull off the raw water supply hose before the thermostat, on my Cobra it would be just before the powersteering cooler, a simple reducing tee barbed fitting something like 3/4 x 3/4 x 1/4 and a,, I don't know pressure you should see off the impeller? a 0-15 lb like a fuel pressure guage maybe.
                              '90 Chaparral 2000SL
                              5.8 Cobra
                              '67 MFG Westfield Regal
                              80hp V-4
                              (No private messages)

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