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Thread: Warning module

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    Warning module

    What's involved in adding a head over temp warning module on a promax 225? I recently purchased an xb2003 . I discovered that there is no warning module . It has the oil injection delete. The only temperature monitoring is a sensor on the top of the starboard head. One tan colored wire goes to the temperature gauge .The sensor works. The motor has a Brucato acu. Does anyone know if the acu supports those head temp sensors, at least I think that's what they are.

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    The tan wire is temp sensor and goes straight to buzzer in harness. Not thru computer. It's hard wired. Same on carbs.
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    You can add one on the other head and piggy back it on the same screw that the stbd head temp sender goes to...or you can put a readable sender in each of those head temp holes and run wires up to gauges in the dash if you wanna readout
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    Quote Originally Posted by Rled View Post
    What's involved in adding a head over temp warning module on a promax 225? I recently purchased an xb2003 . I discovered that there is no warning module . It has the oil injection delete. The only temperature monitoring is a sensor on the top of the starboard head. One tan colored wire goes to the temperature gauge .The sensor works. The motor has a Brucato acu. Does anyone know if the acu supports those head temp sensors, at least I think that's what they are.
    sensor on starboard head is all.. there is no over temp "module".. strictly a buzzer.. port head has a tan and/or tan blue thats for a TEMP gauge... same sensor tha ties inta tha ecu.. 2 tan/blks (ecu), 1 tan and/or tan/blue (temp gauge)...............

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    Quote Originally Posted by tlwjkw View Post
    sensor on starboard head is all.. there is no over temp "module".. strictly a buzzer.. port head has a tan and/or tan blue thats for a TEMP gauge... same sensor tha ties inta tha ecu.. 2 tan/blks (ecu), 1 tan and/or tan/blue (temp gauge)...............
    Their is not a warning module.. There is no beep when I turn on the ignition switch. As far as I can tell, a tan wire goes to the temp gauge from the sensor on the top of the starboard side head. There is another tan wire that is not connected to anything. I was told that originally it was a 260 and the powehead changed to a 225 after the 260 blew up. I want to get all this corrected before boating season. I have a seloc manual but it is not much help.

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    Sounds like someone disconnected it...that other tan wire should go to an idolator block and then into the 9 pin main engine harness...on up to the buzzer (somewhere near the key switch).
    8' Yellow Jacket - 25 hp Mariner
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    you should see a small, plastic term block, starboard side where tha case halves meet that will have 2 tan or tan/blue wires terminated on it.. if you ground those two wires to tha block you should get a buzzer.. if not you need ta find out WHY... oiler stuff removed you will not have tha self check beeps when key is turned on.. test and/or trace tha tan wire on tha starboard head.. unless tha sensor has been changed it needs ta go to a buzzer and/or warning light.. thats its only function.. should be only 1 or 2 wires.. if 2 one will be black for ground other will be tan or tan blue... it will not read temperature... tha sensor in tha port head will have 2 tan/black going to ecu.. 1 tan or tan/blue that is for a temp. GAUGE only.. black ground
    Last edited by tlwjkw; 01-19-2021 at 08:18 PM.

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    Quote Originally Posted by tlwjkw View Post
    you should see a small, plastic term block, starboard side where tha case halves meet that will have 2 tan or tan/blue wires terminated on it.. if you ground those two wires to tha block you should get a buzzer.. if not you need ta find out WHY... oiler stuff removed you will not have tha self check beeps when key is turned on.. test and/or trace tha tan wire on tha starboard head.. unless tha sensor has been changed it needs ta go to a buzzer and/or warning light.. thats its only function.. should be only 1 or 2 wires.. if 2 one will be black for ground other will be tan or tan blue... it will not read temperature... tha sensor in tha port head will have 2 tan/black going to ecu.. 1 tan or tan/blue that is for a temp. GAUGE only.. black ground
    I tested the starboard side sensor and got a beep. It only has one tan wire. The port side has three wires., Two tan with black stripe and one tan that is not hooked up to anything.
    The two tan/black goes to that acu harness. Where does the loose tan terminate?
    Attached Thumbnails Attached Thumbnails IMG_20210122_110519109.jpg   IMG_20210122_110506790.jpg  

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    Quote Originally Posted by tlwjkw View Post
    ... tha sensor in tha port head will have 2 tan/black going to ecu.. 1 tan or tan/blue that is for a temp. GAUGE only.. black ground


    ...............there is a tan in tha harness that continues up to tha dash/controller or gauge, if it has a gauge already...
    Last edited by tlwjkw; 01-22-2021 at 12:10 PM.

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    I have a 3 wire sensor from my 280 if interested, msg me
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    Interesting read. Was wondering as Merc mentions a visual warning kit (light) for over temp vs gauge. How does that function if wired into the current wiring, does it just go to ground at over temp settings ?
    Thx




    Gary

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    I tested the sensor on the top ofClick image for larger version. 

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    starboard side head. It is connected to the temperature gauge. So it is registering water temperature. The sensors in the front of the heads read head temp. Am I thinking right?

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    yes, you are... THAT type sensor IS for water temp.. tha other two are like explained...

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