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Old 13 June 2010, 16:23   #1
ADS
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Mariner 50HP (early 1990's) alarm sounding

Good evening guys, coming back from Cowes earlier on today the 50 on the SR4 started beeping at me coming from inside the depths of the control box.
I topped up the autolube system straight away (there was about a 1/3 in there but it was fairly rough so was probably sloshing around). I felt the engine block and it was warm but no hotter than usual, the tell tale was pumping like a hose pipe as per usual and was ice cold.
Any suggestions of things to check, I reckon the engine is fine it just thinks theres a problem, maybe a poor connection or a sensor somewhere fudged.
Was running mint at the time, even hit 42MPH GPS (on an SR4)
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Old 13 June 2010, 16:49   #2
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Disconnect the Temp sensor and then the oil level sensor when it goes off again, at least you will know which one is playing up.
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Old 13 June 2010, 16:52   #3
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Thanks for the info!
Do you know roughly where abouts I can find those sensors, (i ve recently moved house and I can't for the life of me find the workshop manual!)
Its a triple cylinder, triple carb, the shape after the clam shells.

Cheers,
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Old 13 June 2010, 20:22   #4
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From memory it's attached to a blue/red or blue/brown striped wire attached which is held onto the motor by a plastic bracket. The sensor itself looks like a button cell with the wire attached to the middle of it. It fits into a recess on the head.


You may find you've got one-I think I gave you a new one in amongst the bits when I sold you the boat.
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