1992 Johnson 175hp Silver Star Idle

[motown2]

Hey guys. Been reading some threads on a problem that happens w/ these motors and need some help. I have the above mentioned motor and when i am transitioning in between gears, or just idling (approx 1100rpm), the motor will sputter and stall. Also, I don't know if it is just slack in my shifter cable but it is becoming difficult to find neutral. So once the boat stalls and i am coasting, I have to find neutral before I can restart which can be an issue. Is there an idle adjustment necessary? If so, where is it on this motor. Please help!!!!!!!!!