Merc 2.5 245hp carb adjustment question

[superboattwin250]

Hey guys I have a 1993 Merc. 2.5 245hp motor that I rebuild over the winter and it's running great but I would like to lean out the idle a little bit. It loads up a bit going through no wakes zones. I noticed the carbs( factory non pumpers) have air screws. Is turning them out going to lean it out slightly. I have them set a 1 turn out right now. Top end jetting seems good. I checked piston/ spark plug burn. Thanks mark

[Dave Strong]

In is leaner out richer, they are fuel screws not air screws.

Dave

[superboattwin250]

Thanks for clearing that up for me. I'm going to re check where they are at and then turn them In and see if it makes a difference

[Dave Strong]

My 245hp never liked to idle, but always cleaned itself out after idling though our 3/4 mile idle zone.Never had the screws out to see where they were set from seated.

Dave

[HStream1]

Never hurts to dial them in with a carb sync either. I always set the top two carbs (5 & 6) a little fatter than the others.