In addition to Kärra HF, 63 other teams from 14 different countries played in Boys 18. They were divided into 10 different groups, whereof Kärra HF could be found in Group 10 together with Tyresö Handboll 1, HSG Nordwest, TSG Münster, HK Ankaret and Fjellhammer IL. Kärra HF continued to B-Play-off after reaching 6:th place in Group 10. In the playoff they made it to 1/16 Final, but lost it against Tolered AIK with 11-17. In the Final, HK Ankaret won over AGF Håndbold and became the winner of B-Play-off in Boys 18. Kärra HF also participated in Boys 18 during Partille Cup 2017. They reached the 1/16 Final in B18 A-Play-off, but lost it against Önnereds HK with 13-16.