I faced a similar dilemma with my turkey fryer/boiling pot, and with one of my earlier BBQ's.
For Natural Gas the orifice has to be changed. Natural Gas needs a larger orifice so more gas can pass through.
For one BBQ, I used Orifice Drills and opened up the hole until I got a proper flame. My current gasser had jets for conversion from Propane to Natural Gas.
But I'm sure Harbor Freight won't have any conversion kits for a weed burner.
For my Fryer/crab pot, I bought a burner with a bunch of more jets.
https://www.ebay.com/itm/Wok-Jet-Bu...-WR-JBR23NG-/163687488756?hash=item261c88dcf4
So now I have a natural gas fired crab pot.
Would it be possible for you to use an electric starter?
Or what I use is a
MAPP Gas soldering torch with a 1 pound green can propane bottle screwed onto it.
I call it my "Camp Match". Lights wood or charcoal, as well as a sundry of other flame-on needs.
Has instant ignition, plenty big enough flame, even a trigger lock to keep it on.
I even use it to give my lead casting pot a boost when starting it up.
Much better (to me) than a weed burner.
Come to think about it, I use my torch for weeds in the patio, and for ants. Ants change their minds when faced with a highway of crispy critters.
