Subs to mcm10502 must replace venturi
Burner sm d-h al stl w/std use mcm10502 but you must also replace your venturi.
Burner sm d-h al stl w/stds. no longer available subs to mcm10502 but must also replace venturi tube
Buy this part and as many parts as you like and pay only $8.99 shipping, within the Contiguous United States.