4.1. Open the Torch Oxygen valve all the way.

4.2Igniting the Acetylene 1: Open the acetylene valve slightly on the torch. 2. Use the spark igniter to ignite the acetylene gas. A sooty, smoky flame will appear. 3. Gradually open the acetylene valve until the flame feathers slightly with minimal soot.

4.3 Adding Oxygen 1: Slowly open the oxygen needle valve on the torch until a sharp inner flame appears. 2. Adjust until there are three distinct flames (the preheat flames), with the inner flame meeting the middle flame. 3. Test flame by pressing and releasing the Oxygen Trigger torch lever; adjust as needed.