Thomas Greiss made the momentum-changing saves he needed to make.
Rarely used role players like forward Stephen Gionta and defenseman Scott Mayfield, who hadn't played since Jan. 31, played with an edge and a purpose enough to disrupt what the Rangers were trying to do when they were on the ice.
High impact players like John Tavares, Ladd and Lee contributed on the scoresheet. Ladd had two goals, pushing his season total to 14, including six in the past 10 games. Tavares had assists on goals from Lee and Kulemin. He was a force on the penalty kill.
"It certainly is contagious," Weight said. "You try to talk about it, just let that next line feed off your first shift, let the guy next to you feed off of your energy, your positivity and your grit. If you don't have a deep effort against the New York Rangers you're not going to beat 'em."
The Islanders need a deep effort in every one of their remaining 26 games to make the playoffs.
They put themselves in this position by being below average for the first 41 games, 16-17-8 overall and 5-9-4 on the road. They also put themselves in this position by going 10-3-2 in their past 15 games, including 9-3-2 since Weight took over for Jack Capuano on Jan. 17.
All that did was get them close. Now the hard work starts.
The Devils won't be an easy opponent this weekend even though they're behind the Islanders in the standings. Next week they play at the Detroit Red Wings, Montreal Canadiens and Columbus Blue Jackets before getting a four-day break, which they are expected to spend at home.