Carb kits are available on line, you will need the carb make and numbers off the carb but ebay has lots of them as do some of the parts sources around.
Dan
XL-500 (One owner, me), Another XL-500 XL-15, Big Red, John Deere 350CS(Yellow SXLAO) Old Blue (SXLAO) XL-BC4 Brush Cutter, Little Red, XL2, XLA115/1/400-1P (115VAC, Single Phase, 400Hz, 125Watts) XL-98 Multi Purpose Saw 1969 T50 Chev Fire Truck 1962 K10 Chev Pickup 400SBC TH400 2009 C4500 Chev Kodiak Ambulance 6.0 LMM Duramax