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1990 125 Johnson water control valve

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  • 1990 125 Johnson water control valve

    I have a 1990 125 Johnson ( J125esxess ) I need to bypass the water control valve on because it is leaking. I read on here about someone bypassing a early 90's 200 Johnson with a 1989 70 hp thermostat and housing. Will these same parts work for mine since it is a V4 instead of a V6 ???

  • #2
    guess you need to educate me. The "water control valve" is a spring inside the thermostat housing, isn't it? The thermostat is available for your motor -- thinking that includes the housing, vernatherm, and spring(?)

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    • #3
      If the picture attaches it's #37

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      • #4
        I have heard it called a thermostat bypass valve and a water control valve.

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        • #5
          Hey, Thanks. I stand....educated. Haven't checked iBoats for availability, but/and see references here to Tim's Outboard for hard to find parts. (can't answer your substitution question -- sorry.)

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          • #6
            Part is listed NLA from BRP, but some Dealers might have some in stock. Can the leaking one be fixed/patched with some Epoxy?

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            • #7
              Honestly I would like to bypass it and be done with it. I would rather put a regular spring loaded thermostats in it and be done and not have to worry about the valve leaking again.

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              • #8
                Has anybody bypassed one before ? I know your not supposed to but what would it hurt to run without the thermostats and just let the water flow through the heads. I know it's not ideal but if the part is broken unavailable and is known to leak why not ?

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                • #9
                  The Cooling System was Engineered to function a Certain Way, to do so requires all of the Parts to be there. Removal of Parts or Changes to Water Flow will result in Operating Parameters that are always Detrimental to Engine performance or Longevity
                  It is your Engine and you can do whatever you want to it... But I will not say, Sure rip it out, it was never needed in the First Place, it was only put there to break and require a expensive Replacement...
                  Myself, I would either find a New or Recycled Part, or repair the Existing One.

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                  • #10
                    Wont hurt a thing ...has been done thousand of times on these older looper engines. Will need the cover,gasket,spring and t-stat. Lil pricy but it works great.
                    When in doubt,Trim it out!!!
                    Business Owner & Certifed Technician
                    Boats I own & use
                    20ft Javlin w/250 Junkrude
                    17ft Bullet w/200 Merc (SOLD!!)
                    13ft Allison w/150 I-6
                    17ft Hydra-Sport 175GT
                    15ft Allison w/75 Stinger(project)
                    14 x 48 Drifter with 1100SS Merc

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                    • #11
                      Which year and size engine do I get the parts from ?

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                      • #12
                        1989 70HP ...all the 56ci motors use the same parts
                        When in doubt,Trim it out!!!
                        Business Owner & Certifed Technician
                        Boats I own & use
                        20ft Javlin w/250 Junkrude
                        17ft Bullet w/200 Merc (SOLD!!)
                        13ft Allison w/150 I-6
                        17ft Hydra-Sport 175GT
                        15ft Allison w/75 Stinger(project)
                        14 x 48 Drifter with 1100SS Merc

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                        • #13
                          Thank you for your help , I appreciate it

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                          • #14
                            The covers for those motors are discontinued does anyone have a different number that will work...getting desperate
                            Last edited by Caribbean Project; May 25th, 2020, 05:32 PM.

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                            • #15
                              Sign up today
                              Call some salvage places and see if they have a complete head...this may be how you have to get em..
                              When in doubt,Trim it out!!!
                              Business Owner & Certifed Technician
                              Boats I own & use
                              20ft Javlin w/250 Junkrude
                              17ft Bullet w/200 Merc (SOLD!!)
                              13ft Allison w/150 I-6
                              17ft Hydra-Sport 175GT
                              15ft Allison w/75 Stinger(project)
                              14 x 48 Drifter with 1100SS Merc

                              Comment

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