The nationally-ranked No. 8 Utica College men's hockey team beat No. 10 Manhattanville College 3-1 Saturday Night at the Utica Aud.   Tim Coffman scored the only goal in the first period, Trevor Hertz scored a short hanged goal in the second to make it 2-0.   Manhattanville lone goal came early in the third period, The Pioneers added an empty net goal with 30 seconds left to seal the victory.   UC beat Manhattanville 2-1 Friday night in Rye, New York.