L110 Cranks But Won't Start

So a few months back, I posted saying that my L110 would barely crank. That problem was easily solved with a new battery.



Now the bigger problem: It will crank all day, but not start. Last fall it had a tune up, and ran as of October.



A few observations of what's going on:



1) The spark plug is firing, and is new as of the tune up at the end of last mowing season.

2) The tank is full of treated fuel, filled a few months ago.

3) When cranking, I smell no fuel. I also smelled no fuel when I pulled the spark plug to check its condition.

4) The yellow bulb with the little filter in it is about 20% full of fuel. When I crank it, no fuel seems to enter or leave.



I fear that fuel isn't making it into the cylinder...actually, I'm almost certain of it.



This lawn mower was incredibly dirty when I inherited it last year. While I did clean it up and have all filters changed, I'm worried that something is clogged. I'm also worried that what ever is pumping or drawing the fuel has broken while the mower sat over the winter.



Any thoughts would be greatly appreciated.



Thanks!