I was gifted a toro rtek snow thrower that has sat a few years. Gas tank had leak, which I patched. Getting spark, but no fuel to cylinder. I disassembled and cleaned carb thoroughly. Even watched a YouTube video to make sure I got everything. Still no turnover. If I spray carb cleaner into air intake it fires up for a second, but that's it. When I disconnect fuel line there is fuel coming through from tank to carb. After attempts to start there is no smell of combustion and when I take off exhaust I can see there is no uncombusted fuel in cylinder.
Even if fuel is passing through filter, can it still have a blockage that inhibits suction from engine? Any other ideas other than replace carb completely?