ORIGINAL: Vinyl Cafe
.......So, will my engine still run without it? (You can see what I mean in the pic)
It will run just as well or better. The tube is called a choke tube - by blocking the end with your finger and flipping the engine, you could pull fuel into the engine. If the engine was mounted in a cowled fuselage, priming the exhaust ports could sometimes be difficult, so the tube was added.
The needle will be unsupported, so you may or may not want to shorten it to help protect it from being bent. Secondly, after removing the choke tube, you need to ensure that the backplate screws don't bottom out before tightening up - the ends may need to be filed back.