The original ignition on older Q300 & Q3000 series models is not compatible with this burner. This burner kit requires manual ignition kit #60092 or electronic ignition kit #63788.
https://www.grillspot.com/media/catalog/product/cache/405017c18148bb99b04381dc220baf4d/6/5/65032.pngWeber OEM Stainless Steel Burner Kit For Q300 & Q3000 Series Grills