Starting at the tank: pickup is thru baffle which has a screen in it which also holds fuel float in...clean out tank and check that baffle screen is clean and attached. Then the fuel goes to a fuel switch for ON/RES. Make sure it is clean and allows fuel thru both ports. Then to filter which has a filter, unscrew it and pull filter down, dump it out and clean with air, best to replace if it is broken. Then into carb fuel pump powered by pulse line and internal filters. Something in these must be blocking fuel from carb. Good luck.