ORIGINAL: BillS
Royal engines were notorious for breaking the carb mount casting and the muffler screw threads in the main case when crashed. A carb probably cannot be purchased. Maybe you should consider making friends with JB Weld. JB Weld is a 600-degree epoxy that has been used for at least 50 years to repair almost everything.
Oh yes, JB and I are very good friends. I think I still have some left over from another project. I understand that parts will fit most Royal engines. More specifically the O.S. SF series. The O.S. 4D carb body should work if it comes to that. If it leaks I'll try JB. If that doesn't work I'll try the 4D carb body. If that doesn't work I'll just put the spare .40 that I found in my box of parts on it. Thank you again for all you help thus far.