2002 Johnson 70hp alarm

whackler

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Joined
Sep 1, 2011
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I have a 2002 70hp johnson motor 4 stroke that the alarm is sounding. No lights are lite up on the console that would indicate a problem! We cut it off once the alarm sounded the motor was not hot no smells. We waited a few hours cut it back on and it seems to run fine but the alarm sounds and stays on when you know the motor is not even warm. No lights say lite up on the console. Water is pumping out the motor and again seems to run fine. Does anyone know what could cause this? We let it set over night and started it up the alarm stayed on just as soon as you turn the key and stays on no beeps just a continoues alarm sound. Thanks in advance for your help or ideas!
 
Joined
Oct 28, 2010
Messages
923
Re: 2002 Johnson 70hp alarm

Any change in engine running capabilities? Rpm reduction? You could disconnect the oil pressure sensor and see if alarm stops. If you have no change in engine running conditions might check voltage output at battery with a voltmeter. You could try disconnecting the overheat temp alarm, maybe stuck switch?
 
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