Will not start

And if you can share how to remove it. I see a white ring around it and am not sure if it's the usual way of removing pumps by tapping it with a hammer until it's loose.

I tried again after I left it for 30 minutes and gas came out of the pump. The gurgling noise made me suspect that maybe the gas level isn't right, or gauge isn't working. I put gas in it, and it started lol. I'm not sure if it has other issues but I'll let it run first and see.

I just had a feeling it may be low gas, or the pump isn't picking up low level of gas of maybe there is eater. Put three gallons in and she kept running. Drove it in driveway and it drives strong, am waiting on plugs so I can change them. Just weird. It was not throwing any gas and I tried again and it was. So far, no stalling or check engine light, but the first time I started I checked for codes and there was p125.