idle adjustment on a mercury 5.0 mpi

[Chris S280]

got twin mercury 5.0 mpi with bravo 3 outdrives and one motor idles lower than it should i was seeing if anyone knows if it is a adjustment is on the cables by the motors or of it needs to be adjusted elsewhere. I looked on here and can't find anything about adjusting the idle

 

[Brite Idea]

MPI idle is controlled by the IAC and is not adjustable.

 

[Chris S280]

MPI idle is controlled by the IAC and is not adjustable.

That must be the problem. When I bought the boat last year when i cleaned the boat out from the previous owner I found one in there. I asked the marina that did the work on it last year to fix the idle for me but I thought they just forgot to fix it because when i asked them to they said no problem thats easy but after doing the manifolds and risers I thought they forgot and never said anything about the IAC. Got a new one in the boat ill change it tomorrow. Thanks