Mercury system fault message

[jmh102]

I have a 2012 280 with a seacore 350 mag. On a recent trial from the winter launch, I got a system fault message and a loud steady tone. The engine went into idle automatically. I'm only at 28% fuel and it was very rough that day. I have changed the Gen III cool fuel filter but have not gone back out yet. Could this have triggered the alarm? Also on the read out I could not advance the msg to read the fault. It just went back to the "home screen"

 

[paulswagelock]

I do not believe Merc monitors fuel pressure anywhere, so an issue with the filter is unlikely to send you into guardian. Do a quick search on guardian mode and you will see the sensors that can put it in that mode. That is the list your will need to check.

 

[jmh102]

Thank you paulswagelock. I'm not too sure what you mean by a quick search of the guardian

 

[IslandTime]

Thank you paulswagelock. I'm not too sure what you mean by a quick search of the guardian

If you have a water pressure sensor, which you probably do, a low reading will put you into guardian.
may want to check water pressure and may be time to to take a look at the raw water pump and intake betweend your outdrive and the water pump. May have some blockage or corrosion in the rubber intake lines causing low pressure...