js550 doesnt want to run

FAC

Petty Officer 3rd Class
Joined
Jul 30, 2009
Messages
79
Im working on this ski and i cant get it run completely. If I place my hand on the carb it will suck enough gas in to run for a second or two then die. this makes me think its a fuel delivery issue, Either the fuel pump or something else. I have switched both the carb and fuel pump out with used ones with no change at all and I am kind of stuck at this point. Can anybody give me some things to try?
 
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