Change the fuel filter (I use one out of a 92 ford 350 fuel injection, much bigger) Rebuild the carb. I rebuild/clean mine so often, I carry a spare kit and can of brake clean in the glove box. While you have it apart pull the fuel line off the pump and shoot a little air through the fuel line back to the tank. Same with the lines from the charcoal filter if you still run it. If all that doesn't fix it, you might have to pull the tank to change the filter on the pick up.