Pins 1 and 9 are all you need for a machine torch on the Razorweld. They are your pilot arc pins and are hooked together and run to the cup threads (positive) on the torch head.
If you have the torch clamped on the torch head some times it causes the inner parts to jam up and not pilot arc. You also need at least 65psi flow air to the machine torch or it will not pilot arc.
