2013 vino needs help

[wereynolds]

Hello all. I saw this forum and was hoping someone could help me figure out why my vino isn't running. Its a 2013 50cc. Has about 300 miles on it. Ran great when it was put up. Sat for months. When it wouldn't start, I emptied the fuel and replaced. But I didn't do anything to the carb. Sent the injector off to have it professionally cleaned. They didn't find anything wrong with it. Here's what it does. Starter turns over quickly and without the injector attached to the fuel hose, fuel pumps out of the hose. With the injector attached to fuel hose but not bolted in, no fuel spray comes from the injector. I'm not even sure if fuel should spray with the injector not bolted in. I really don't want to take it to the shop and was hoping it may be something fairly simple that one of yall could point me to. Thanks in advance for any help.