Binghamton leads the best-of-seven series, 3-1.
Mike Hoffman and Ryan Keller rounded out the Senators' goal scoring while Corey Locke registered three assists.
scored the lone Pirates goal on an assist from defenseman Nick Crawford
. GAME 4 BOX SCORE
The Senators used three first-period power plays to build a 3-1 lead after one. Hoffman opened the scoring with the man advantage just 2:54 into the game. Adam tied it for the Pirates only to see Daugavins connect 10 second later to restore the Senators' one-goal lead. Keller added another power-play goal in the later stages of the first to complete the period scoring.
Daugavins, with his second of the game, and Potulny accounted for all of the offense in the second to carry the home side into the third with a 5-1 lead. Potulny registered his second of the game to complete the scoring in the third and give the Senators a 6-1 victory.
The Senators out-shot the Pirates 39-23 as goaltender David Leggio
started and took the loss. Leggio surrendered four goals on 20 shots before being replaced by Jhonas Enroth
early in the second with the Pirates trailing 4-1. Enroth turned aside 17 of the 19 shots he faced.
Robin Lehner picked up the win in goal for Binghamton, stopping 22 of 23 shots. Portland's Paul Byron, Derek Whitmore, Mark Mancari and Matt Ellis
led the team with three shots apiece.
The Allied Home Mortgage Three Stars of the game were all from the Senators. Daugavins was the first star, Keller the second and Potulny the third.
The series remains in Binghamton for Game 5 Tuesday at 7:05 p.m.