generator won’t start 5

https://northpixelate.com/s/WS0WXKLPouy7uidC1lq7E

I went to fire up the generator, turned the key, and nothing. It's been sitting for a while, maybe stale gas or a clogged filter. I can hear the starter clicking, but it won't turn over. Frustrating, since I need it for a job tomorrow.