[willy]

First the usual suspects, check fuel line has no air leaks, second if you have two bulbs, one for the big motor one for the small check the bulbs. I just went thru this with a brand new boat and motor. Went thru three brand new good quality bulbs in the dealers yard before we found one that actually worked. Next would be what Skools said, pull line going into carb and ensure your fuel pump is actually working because they go all the time, when they do they usually have a leak or break of some kind in the diaprahm, leaky diaphrams are never good ::)