You might also check the hose the goes from the carb to the engine, under the air filter. I found mine full of holes. Replacing this hose fixed the problem.
I had thought the lack of fuel was due to a plugged intake hose. The see-through filter looked as though there was no fuel flowing. Disconnecting the line before the new filter would only allow fuel to flow if the fill cap was vented.
pbeaudet, May 2009