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    1989 90HP Mariner

    For the sake of curiosity and informing others, I'll post pictures of how it looks haha I did take it out yesterday and cleaned off the tstat a bit. I'm picking one up today and swapping it so when I do that I'll get some pics and post them. Thank you for your responses Thanks! Seems more to me...
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    1989 90HP Mariner

    Thanks for that info and I'm sure a flush won't get all of the salt out. I'll pull out the thermostat and poppet valve when I get home. I'm going to swap that out regardless of the warning module issue. I guess my final question is, if the t stat and/or the poppet valve are bad, would that cause...
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    1989 90HP Mariner

    Yes it has a tank on the engine and two blue wires going from the warning module to a sensor in the tank. If I disconnect the two blue wires, but leave the temp sensor connected, the noise doesn't stop. It seems like no matter what is connected to the module, it beeps as soon as I connect the...
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    1989 90HP Mariner

    To be honest, I don't know what if it's a model for salt or fresh. I do know the previous owner used it in saltwater and I've used it in saltwater with rinsing the internals by running the engine with freshwater. I have no idea about the thermostat. Will a stuck thermostat cause the heat temp...
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    What next? 90 hp Mariner

    I had a very similar situation. I was running at WOT, then slowed down entering the no wake zone and the engine just died. I would turn the key, engine would try to start but wouldn't. I had to get towed in. Once I trimmed the engine up to get it out of the water, the carbs drained. Got home and...
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    1989 90HP Mariner

    Not sure how it's supposed to work, but seems like the signal is coming from the warning module itself or the engine harness.
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    1989 90HP Mariner

    Update, If i completely disconnect the temperature sensor(disconnected the single lead from the temp sensor from the terminal block it was connected to), the warning horn still sounds
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    1989 90HP Mariner

    Hello, I am having an issue with the warning module. I bought a boat with this outboard about 2 years ago now and ever since I have had it, the warning buzzer has been on as soon as i turn the ignition switch on. A mechanic checked it out after I purchased it and said the buzzer itself was bad...
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