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Author Topic:   1996 Evinrude 90: Alarm Going Off
Blue Goose posted 05-24-2009 06:39 AM ET (US)   Profile for Blue Goose   Send Email to Blue Goose  
I can't figure our what is going on with the warning system [on a 1996 Evinrude 90-HP outboard motor]. [The aural alarm] goes off for a half second every 30 seconds to a minute. There is oil in the [oil tank] and everything else seems to be working fine.
seahorse posted 05-24-2009 07:33 AM ET (US)     Profile for seahorse  Send Email to seahorse     
If you hear a short beep about every 30 seconds, then you have a 1995 or earlier motor and oil tank and the alarm is for a LOW OIL level. If the tank is above 1/2, then the float system or electronics inside the tank are faulty.

In 1996, OMC came out with the SystemCheck warning that using a 10 second horn along with an indicator light that showed LOW OIL, TEMP, CHECK ENGINE, or NO OIL

jimh posted 05-24-2009 09:20 AM ET (US)     Profile for jimh  Send Email to jimh     
This article seeks repair advice, not performance advice. It should have been posted to REPAIRS/MODS.

According to the Evinrude owner's manual description of alarm signals

the alarm cadence you describe indicates low oil level in the oil reservoir tank.

Whenever an alarm occurs there are three posibilities:

--the alarm is real, there is an alarm condition;

--the alarm is false, there is a defective sensor;

--the alarm is false, the alarm itself is faulty.

Since your visual observation of the tank level shows otherwise, you can assume there is a malfunction in the alarm, and this is a false alarm. You can easily test to see if the source of false alarm is a sensor. Disconnect the oil tank sensor from the alarm system. If the alarm quiets, the sensor was probably the source of the false alarm. If the alarm persists, the alarm unit itself is probably bad.

jimh posted 05-24-2009 09:22 AM ET (US)     Profile for jimh  Send Email to jimh     
[Moved from another discussion area to REPAIRS/MODS.]
Blue Goose posted 05-24-2009 09:44 AM ET (US)     Profile for Blue Goose  Send Email to Blue Goose     
How do I go about disconnecting the alarm system.

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