The second quarter saw Imlay City net 14 points and Algonac generate 13.
That made it a 25-25 ballgame at the halftime break.
The next eight-minute stretch would also prove a closely contested one.
It was there Imlay City deposited 15 points through the twines, while Algonac managed 14.
That made it 40-39, Imlay City, with 24 minutes elapsed.
Imlay City followed it up with an 11-9 fourth quarter advantage, closing out a 51-48 win at Algonac's expense.
Alex Maldonado (18 points, including a trifecta) and Aaron Thompson (10) led Imlay City with double figure performances. They were backed by Brad Kramek (eight points), Darren Saunders (six, featuring a trey), Adam Van Dyk (four), Steve Lesniak (a triple) and Blaine Goertler (two).
Brad DiMaggio and Alex Schmidt (11 points, including a trifecta each) paced Algonac.