these rigs are not carbureted,so pumping the skinny isn't going to send any more fuel.you can pump the peddle if you want for the exercise lol.
you need to check for air intrusion,and test the glow plug system,along with first inspecting the starting system;cables/terminals/batteries/stater etc.
did you check the top threads yet Kurt about testing GP's etc? having a full set of 8 working Beru's is a must.