Formula400

I have a 2005 Formula 400ss with under 200hrs and twin 496HOs Bravo 3X drives. Everything appears and sounds to be running perfectly fine, they start right up idle fine, solid power all the way until around 4300-4500 rpm and then one or both sometimes shut down back to idle. Has been doing this for awhile so i dont believe its the gas as i thought at first i may of had bad gas but i have filled up twice since. I am getting one alarm but its for low drive oil, i topped the container off on both and alarm dosent beep anymore but does show up in active alarms in my vessel view screen. Could this alarm being active be sending the engine computers into a safe mode or something?

Also what should these motors redline at? Everything is factory still no modifications

Formula400

bump... Anyone?

wannabe

Have a merc mechanic pull the codes. Do they run fine at 4000? Running those on the pins is tough on them in a BIG boat like taht. Check your coolant levels too.

JRider

iTrader: (1)

Pull the codes, if no codes fuel pumps. Easy to change BTW. Ethanol eat them