Willmar got on the board first when Isaiah Cameron tallied an unassisted goal just eight seconds into the game. A goal at 8:40 by Isaac Young tied the game at 1-1. Mike DeBrito assisted on the goal. Declan Young put the Otters ahead 2-1 at 15:31 with DeBrito and Chase Jensen assisting.
In the second period, Cole Zierden scored from Isaac Young and Mike DeBrito at 6:32 and Declan Young added a power play goal from Colton Partain and Mason Hoffman at 15:28.
Declan Young scored an unassisted power play goal at 5:07 of the third and recorded his fourth goal of the game at 8:39, assisted by Jensen. Willmar wrapped up the scoring when Ashton Gregory scored from Devin Sankey and Eldridge DeKraai at 15:31.
Ian Stumbo returned to the nets after missing several games due to illness and stopped 13 of the 15 shots he faced.
Fergus Falls (7-11-2) will play at Alexandria on Thursday night.