RESTO 95 spi Firing issues

[Whiteboy2]

I'm in the process of restoring an spi. I rebuilt the fuel system and used some premix to start the thing this morning. It started and ran good. I put regular fuel in it and put oil in the tank and it wouldn't do anything when hitting the start button. I checked my battery and connections and it all checked out good, I was thinking maybe it was something to do with the oil tank sensor not allowing it to crank so I disconnected the plug and it turned over. I plugged it back I and it still turns over but wont fire now? Can someone tell me where I should start on my trouble shooting journey? Thanks in advance!