I removed the firebox yesterday and in the process cut 2 Bowdon cables. I have since learned from a very helpful guy in Germany that these cables were for regulating the engine speed for the pto driven pump in the back of the truck. Once you cut those cables you need to adjust the idle as now the truck idles too low and stalls. I'll follow the linkage that the bowdon cables were connected to find where it is connected. Now, on our boat there is a simple screw for the adjustment. How do you set the idle on an OM366LA?