fault codes

2003 Sea Ray 280 / Twin Mercruiser 4.3 / Alpha One Gen 2 Had boat out ran fine. Docked at a marina for the day. On way back home when sb engine reached at or over 3500rpm it went into Guardian Mode, i believe. It throttled itself back to around 6% with constant alarm until i took it to neutral...

Hi Folks, 2010 Sundancer 240. We were cruising 3500-4000 RPM for around 25min. Then the engine sputtered and I received a System Fault that read “Engine power limited” When I click “action“, it reads “Reduce engine rpm”. Then the error goes away and I can bring the engine back up to...

I'd appreciate a referral to a manual explaining the possible fault codes of my 2003 5.0 L MPI w/o Smartguard, S/N OM 600590 or some guidance. Not young, I've watched and used the codes as they came into my autos, trucks and motorcycles. I now know that the first thing to do with any performance...