MONTREAL -- Alex Galchenyuk scored on a spin-around shot 3:40 into overtime to lift the Montreal Canadiens to a 3-2 victory over the Ottawa Senators in Game 2 of their NHL Eastern Conference playoff series on Friday night.

Montreal retained home-ice advantage by winning it first two home games of the best-of-seven series. Ottawa will try to do the same in Game 3 on Sunday and Game 4 on Wednesday at the Canadan Tire Centre.

"It's great to get an OT goal," said Galchenyuk. "It's always nice to get one. But I don't sit around and think about that. Time will tell when you can rate those kinds of goals."

Max Pacioretty and P.K. Subban scored for Montreal, which outshot the Senators 42-31. Carey Price made 29 saves.

Pacioretty scored in his first game back from a concussion after missing the opener and the final two regular-season games.

"I think of myself as a player who steps up in big games and makes a difference," said Subban. "I always felt that the more pressure people put on me the better I'll play. I wanted to be better tonight for my teammates."

Clarke MacArthur and Patrick Wiercioch scored for Ottawa, while Mark Stone had a pair of assists despite limited mobility in his right wrist from a controversial slash from Subban in the series opener on Wednesday.

Goalie Andrew Hammond bounced back with a solid game after a shaky opener, but gave up a rebound that Galchenyuk cashed in for the winner.

"The reality is we're down two games and we have to find a way to win," said Ottawa coach Dave Cameron. "During our streak, we didn't look at how far we were back. We won. That's the focus now. To find a way to win."

The Senators came out hitting, throwing 21 checks in the first period alone, and got the lead.

Stone was in on the opening goal with a pass on a rush that saw MacArthur beat Price with a dipping shot from the slot at 18:42.

The Canadiens adjusted to the Senators forechecking and turned the tables in the second, outshooting Ottawa 14-3, and taking the lead.

Pacioretty was parked in front to take a pass from David Desharnais and beat Hammond with low shot between the pads on a power play at 7:18.

Subban, who escaped suspension for his slash on Stone, took a pass from Devante Smith-Pelly and blasted a rocket past Hammond at 16:30.

Stone made the pass again as Weircioch went to the net and got a shot between Price's pads on a power play at 13:25 of the third.