guardian

2005 SD 320. Merc 350mags. Last season after experiencing reduced RPM and vibration from my port engine (wouldn't go over 2,600rpm under load). Mechanic suggested a full tune up. they replaced, spark plugs, cap and rotors, fuel filters, flame arrestor. I ended up gaining about 200 rpm. I...

Boat: 2005 Sea Ray 220 Select w/ Mercruiser 5.0 and Bravo III Problem: Alarm sounds and display reads "check engine, low h20 pressure, guardian mode, reduce throttle, power limited to 49%, check engine" and so on. It starts this after you hit about 25mph or about 3200 RPM. The impeller was...