Robinson added seven rebounds, three assists and two steals. Kentucky transfer Charles Matthews scored 20 points in his Wolverines' debut while Moritz Wagner collected his second career double-double with 18 points and 12 rebounds. All 12 of the Wolverines who played scored at least two points.
Sophomore swingman Garrett Sams led the Ospreys (0-2) with 17 points. Ivan Gandia-Rosa added 12 points and J.T. Escobar chipped in 10, all in the first half. North Florida, which committed 24 turnovers, lost to No. 2 Michigan State 98-66 in its opener on Friday.
The Wolverines led just 32-30 at halftime despite 14 North Florida turnovers.
Sams made three 3-pointers early in the second half, then capped a 7-0 Ospreys' run with a lane jumper to give them their last lead at 47-46. Michigan regained the lead on a Robinson 3-pointer and stretched it out with more scoring from the senior swingman. He added another 3, a coast-to-coast layup, a dunk and two free throws over the next six minutes to give the Wolverines a 65-53 lead.
Wagner's three-point play gave Michigan a 20-point lead at 73-53 with 4:29 left.