High Quality and Quality Guaranteed. Replacement for Spartan Mowers CARB- RZ-C, RZ, RZ-PRO. Replacement for Spartan Mowers CARB- RT-PRO, RT-HD, RZ-HD. Replacement for Spartan Mowers CARB- SRT-HD, SRT-SXE. Replacement for Spartan Mowers EFI- SRT-XD, KGZ_XD. Note:Does Not Fit Spartan Shield or Defender Models. Items are aftermarket, so, most items don’t include instructions.