Can I use a dual function control in a dual station boat?

Yes, if you use the DS units shown in our catalog. 

If you do not use the DS units, with dual function controls, the controls will bind up.

Instead, use one single-function, dual-lever control per engine at each station, such as the Dometic Twin S Control (CH5200P). 

Single-function controls for twin stations are set up with the cables "in series" meaning that each cable is run from one lever of an upper station control to the corresponding lever of the lower station control. Another cable is then run from the lower station control to the engine. When the cables are properly connected, moving the levers at one station will move the levers at the other station in addition to actuating throttle and shift. 

Shift detents should be used in the lower station control(s) (closest to the engine) only. Do not install shift detents in the second station control. 

When mechanical controls are used in two stations, we always recommend Xtreme control cables (CCX633xx) which are also specifically designed to work smoothly in twin station applications. When combined with CH5200P controls, these cables give you superior smoothness and response. Because of their unique construction, these cables have very little backlash, so a high-quality synchronization of the control head lever position and feel at each station (including shift detents) is possible. 

If a mechanical control system cannot deliver an acceptable feel or response, upgrade to an electronic control system.