Set the Mixture to NONE. Not needed for this Plane and this Setting could effect the Engine Start. It does it for me with the Honeycomb Quadrant, but only for one Engine.
I'm not familiar with your Throttle Quadrant, so I don't know about the Lever Zones and how the configure them in XP.
A physical Detent on the Quadrant is a Stop before you can move on further. F.e. a Stop between Alpha and Beta Range. In the real Moo, that's the Point you have to lift the Levers to reach the Beta Zone. The second Stop is the Stop before reaching the Reverse Zone.
The Honeycomb Bravo has no real Detent but Switches to activate Reverse, Emergency Stop or Fuel Cut Off. Using the Modern Throttle Configuration with the Bravo, a Response Curve as shown in the Docs and Auto-stop power levers at detent IS CHECKED, the 3D Lever in the Cockpit stops at Flight Idle. That's half the Way down for the physical Lever on the Bravo. Using the Power Lever Lift Command, the 3D Lever goes now into the Beta Zone when moving the physical Level down further. When reaching the Switches for Reverse, the 3D Lever is in Ground Idle. With moving the physical Lever full down, activating the Switches, Full Reveres is activated.
The Throttle Setup for this Plane is a little bit tricky. I need a few Hours before I had all my Settings done. You have to try out the different Methods and Settings.
If your Quadrant has no Detent, try to set the Lift Zone at around 50 Percent Hardware Travel. So if you move the physical Lever down, the 3D Lever should stop at least in the middle of the physical move when going into Idle and the Beta Zone. Not sure about the Reverse Handling with this Quadrant. If there is no Switch, you have to use a Button or Key for toggling Reverse.