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re: Beeper/alarm on 90 horse mercury stays on
Posted on 5/24/19 at 6:00 pm to Bleeding purple
Posted on 5/24/19 at 6:00 pm to Bleeding purple
Low oil is intermittent beep. Overheat is one long beep. Just looked it up in the service manual.
Unplug the black wire from the temp sensor and see if the alarm stops.
It could be the warning module or the overheat sensor.
Unplug the black wire from the temp sensor and see if the alarm stops.
It could be the warning module or the overheat sensor.
This post was edited on 5/24/19 at 6:07 pm
2
Posted on 5/24/19 at 6:13 pm to sparkinator
Or low block pressure, or low voltage, or some other things.
Really need the engine model
Really need the engine model
Posted on 5/24/19 at 6:32 pm to sparkinator
On my carb 175. Constant beep was overheat and or oil pump not pumping. Intermittent beep was low oil on the motor reservoir. Mine had been played with by the previous owner though.
Now that it is deleted and tank mixed, overtemp is wired straight to the beeper. I did have a temp sensor fail closed one time and it did exactly what you say.
If I remember right, mine used to give you a few beeps or a long beep when you first turned on the key to let you know the module was working. I kinda remember that maybe it beeped until the engine was started.
Temp sensor should be easy to test. It should be open to ground when not tripped. And located on the head. I think the oil reservoir is the same, open to ground when the float is up. Not sure about the pump sensor though. I wonder if it’s pressure based or based on the pump shaft rotating and that might be why I kinda remember mine beeping until the engine was running.
Now that it is deleted and tank mixed, overtemp is wired straight to the beeper. I did have a temp sensor fail closed one time and it did exactly what you say.
If I remember right, mine used to give you a few beeps or a long beep when you first turned on the key to let you know the module was working. I kinda remember that maybe it beeped until the engine was started.
Temp sensor should be easy to test. It should be open to ground when not tripped. And located on the head. I think the oil reservoir is the same, open to ground when the float is up. Not sure about the pump sensor though. I wonder if it’s pressure based or based on the pump shaft rotating and that might be why I kinda remember mine beeping until the engine was running.
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