I've got a 98 Johnson powerhead w/ 6 carb looper. Issues are;

1. engine runs a little rich. plugs are a little wet after running. Not sure if the issue is carbs set too lean or not.

2. after I warm up the engine, make a run to a fishing hole, get ready to move, engine starts, idles fine, but when I go to take off, engine dies. then I start it, have to gun it to get it to open up. sounds like it's trying to flood out. Have actually flooded it, had to wait 10 minutes or so to get it started again, etc. again, not sure if it's related to Issue #1.

If I make adjustments, (I have the seloc manual, found instructions for adjusting on water in gear idling) is there a special tool needed to adjust this screw? I found the adjustment, but it doesn't look like an allen wrench. I'm not sure.

Bottom line, not sure the issues are related, or if it's something else. This powerhead is used, but in very good rebuilt condition. My mechanic did away with the oil side of the VRO pump, and I mix my gas in the tank. every time i run it, I seem to have very good power. boat gets up on plane very fast, and can run to 5500 rpm quickly. engine has great compression. any ideas?