Thanks for that. It worked this time. I started the engines , let it run for a while to warm up, taxied to the runway than prior to takeoff activated the fuel boost pumps. Once airborne and on steady climb, deactivated the fuel boost pumps and engines remained alive. It sure is a big learning curve.
The next thing if at all possible, is there a keybind for allowing to set the mixture? Individually setting the mixture to rich and lean is difficult using the mouse and affects the aircraft because of the delayed reaction of the movement of the mixture control.