Just a suggestion...
Next time try pressing the button in the "Off position" (Gasser Prime/preheat for diesel) for about 15-30 seconds prior to pressing the button in the "Start position".
What this does is power the fuel pump so it will "Prime" the fuel line and carburetor/injection system. (Pre-heat the diesels)
Let us know if this solves the problem.
I also see this is your second post.
Glad ya came by and joined us...