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  Interpretation of Fault Code from a Mercury Engine

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Author Topic:   Interpretation of Fault Code from a Mercury Engine
wyesguy posted 06-27-2015 10:02 AM ET (US)   Profile for wyesguy   Send Email to wyesguy  
My vessel has twin 2011 250-HP Mercury OptiMax outboard engines The smart box is sounding a brief beep and displaying the message "system alarm". The history and current alarm sections read: "STBD FAULT 236 STOP CKT ACTIVE. I tried to search for the error an interpretation for this code, but to no avail. Can anyone direct me to where I might find a translation. I don't observe any [effect on] performance (with the exception of the new Mercury transducer/paddle wheel combo providing only an intermittent readings on the smart box). Thank you very much.
jimh posted 06-27-2015 10:56 AM ET (US)     Profile for jimh  Send Email to jimh     
My wild guess about the meaning of "STP CKT ACTIVE" is "stop circuit is active." That sounds like the emergency safety lanyard has been dislodged. The code "STDB FAULT" suggest to me that there are twin engines and the fault is originating from the Starboard engine.
jimh posted 06-27-2015 03:25 PM ET (US)     Profile for jimh  Send Email to jimh     
What is the "smart box" you mention? Are you describing some sort of Mercury instrument? I don't recall a model called a "smart box." Mercury brands their modern engine instrumentation under the general name of SmartCraft. They give distinctive model designators to their instruments. If you provide the distinctive model designator for a Mercury SmartCraft instrument, it may be helpful in getting more information on how to interpret the visual display codes you are seeing.
wyesguy posted 06-28-2015 09:47 PM ET (US)     Profile for wyesguy  Send Email to wyesguy     
Yes, sorry. It is a Smartcraft dash display. It supposedly reads all things related to the twin Optimax 250s. I have switched the toggle switch for the cut off circuit on and off several times, in case it was not seated fully, or need a more solid connection. Still to no avail. My next experiment is to replace the toggle, or simply short it temporarily.
jimh posted 06-29-2015 08:13 AM ET (US)     Profile for jimh  Send Email to jimh     
Jumpering around the safety lanyard switch--that will be a good test. Let us know what happens.
Robert V posted 07-06-2015 08:52 AM ET (US)     Profile for Robert V  Send Email to Robert V     
The emergency stop has been activated, copy of code from the Mercury Smartcraft manual follows:

236
Emergency Stop
Emergency stop has been activated. Check lanyard.
Non‐Critical ‐ Service Engine Soon ‐ Refer to Owner's manual for service procedure.

Looks like you may have a defective Emergency Stop switch, try to replace or jump around as previously mentioned. Good luck,

Robert

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