rough idle

Hey everyone, Having some trouble with the 135 merc on my 89’ seville. Had er out last weekend & everything seemed to be running fine but accidentally ran it out of fuel(fuel gauge not working). Filled the tank up with fresh gas, and went to start it. It gave me some trouble starting, but...

So both engines are not idling properly. Stbd One has to idle around 2000 and will stall out at 1500. Port engine will idle at 600 - 700 but overheat quickly at idle but maintain temp at around 1200 - 1500 rpm. Could timing be be an issue? Or the throttle be set wrong or even the fuel be too...

HELP!!!! Here's the story. I have a 1995 Sea Ray 370 Sundancer with carburated 7.4 BlueWaters(454's). A couple weeks ago I started experiencing rough idle, acceleration, eventually leading over time that the port engine just wont idle anymore. I replaced the spark plugs, coil, cap, rotor...

My boat is in the USVI, and we don't have the option or luxury of a dealer, a technical expert, or a test computer. My STBD has been dead matched rpm for rpm with Port since the day they were installed. Without any degradation, Stbd just suddenly ran very poorly at cold start, and never really...