Looking for some insight into carbs.

I have 3 carbs on my Suzuki outboard.
Each serves its own cylinder.
The bottom one is what I will call the primary.
It has the idle adjuster on it.
It was leaking I noticed yesterday from the bowl drain, a steady drip, drip, drip.
It was hard to get to, but I did.
I know it's hard to answer questions in a general sense, without knowing the exact situation, but I was hoping for some suggestions, knowledge, etc.
It was running crummy at times at low speed/ idle, no throttle.
I thought if I advance the rpm, that might help, but I got a lean sneeze instead. Also, after running, GREAT, then sitting for a spell, it would often be stubborn to restart again, was this because the bowl had drained?

Thanks for any lesson you can lend me  

On some carbs, where we would have a drain, they have an overflow.
So check again.

Boats and crappy running.
My first question is fuel. If the fuel is starting to show layers, it's gone to crap, absorbed water and is junk.
Get fresh gas, hook up, purge the bowls, see what happens.
Unless you Know the gas is good.

How long did it sit.?
How did this condition present itself?
Quick? Just started the engines recently and it was running poorly?

Are all three motors running equally crappy?
If so, isn't the One Common Element the Fuel?