the squirt is the accel pump. Different than the pilot or fuel screw. The pilot and fuel screw regulate the low speed idle and off idle mixture. If it didnt start with start fluid it could be because you twisted the throttle so many times looking at the squirt, that it is now flooded. It could also be the valves and several other things. You just have to start doing some things to figure it out. ALWAYS do the cheap and easy things first. Even just a new plug sometimes fixes many problems.