Yanku was just 4 of 13 from the floor, but hit 7 of 9 free throws. Jacobsen was 7 of 10 shooting with nine rebounds. Gaellan Bewernick added 10 points and nine boards. Northern Arizona (14-16, 11-8 Big Sky) benefited from a 19-9 advantage on points off turnovers and 38-19 rebounding edge.
Montana State led 21-12 on Colbert's 3-pointer midway through the first half, but Northern Arizona clawed back to tie, then lead 33-29 at the break.
The Bobcats went stone cold in the second half, shooting just 6 of 23. The Lumberjacks used a 14-0 run early in the frame that covered 9:02 and ran away with the win.
Colorado State graduate transfer John Gillon has chosen Syracuse, giving the Orange a potential starter at point guard entering the 2016-17 season.
DeSean Murray, who averaged 20.2 points as a sophomore at Presbyterian, will transfer to Auburn to play for coach Bruce Pearl.
Former Kentucky guard Ed Davender, the only Wildcat with at least 1,500 points and 400 assists, has died. He was 49.