West Ottawa scored twice in the first quarter on touchdowns by Isaac Van Dyke and Max Voet. The Panthers struck more three times in the second quarter to take a commanding 35-0 lead going into the half.
In the third quarter, Isaiah Reynolds finished up the scoring with a two-yard touchdown run.
Bucs fullback John Treichel III led the team with 39 yards rushing on six carries. Connor Worthington added 36 yards rushing on nine carries.
The Grand Haven defense was led by Aidan Cooper with seven tackles and Alex Kapala with five.
The Bucs fell to 2-6 overall and 0-6 in the O-K Red. They host GR Union next week in their last game of the season.