If there was a .40ci (6,5ccm) diesel of a similar configuration to the Webra Blackhead 40 one could try it I suppose.
I doubt that the engine speeds would be low enough to really make that much difference unless the diesel's top
end is half that of a comparable 2 cycle glow.

One thing you must all keep in mind that the Webra 40 that's used in this power system is tightly integrated into the unit.
It isn't trivial to adapt another engine type.

Jerry