The HfFe 6 Ge 6 -type LuMn 6 Sn 6 - x In x compounds (0.1=<x=<2.0) have been synthesized and studied by powder magnetization measurements. The compounds with low In content (x I n =<0.6) order antiferromagnetically with Neel temperatures decreasing from 380 K for x=0.2 to 282 K for x=0.6. The In-rich compounds (1.2=<x I n =<2.0) display ferromagnetic behaviors in their whole ordered range with Curie temperatures decreasing from 263 K for x=1.2 to 221 K for x=2.0. The compounds of intermediate compositions (x I n =0.8 and 1.0) order ferromagnetically at T c =280 and 278 K, respectively, and undergo a ferro- to antiferromagnetic transition on cooling (T t =248 and 151 K, respectively). The variation of the threshold fields confirms the increase of the antiferromagnetic character on cooling. These results are discussed and compared with the different behaviors observed for the corresponding LuMn 6 Ge 6 - x Ga x solid solution.