Tim Kerr scored two power-play goals to lead the Philadelphia Flyers to a 5-1 victory over the Pittsburgh Penguins last night in a penalty-filled game in Philadelphia.

Kerr, adding to his NHL record for power-play goals in a season, scored his 30th and 31st on the advantage and 49th and 50th overall as the Flyers handed Pittsburgh its 21st straight loss at the Spectrum.

The victory allowed Philadelphia to increase its lead in the Patrick Division over the idle Washington Capitals to three points.

Kerr gave Philadelphia a 3-1 lead 4:55 into the third period when he put a 40-foot slap shot past goalie Roberto Romano. Islanders 7, Maple Leafs 1

In Toronto, Mike Bossy scored three power-play goals and Pat LaFontaine had two goals to lead New York to the romp.

Despite the loss, the Maple Leafs clinched a playoff berth as a result of Detroit's overtime defeat by St. Louis.

The Islanders, with five victories in their last six games, came up with goals on four of five power-play opportunities. Bruins 6, Kings 3

In Boston, Ken Linseman, Keith Crowder and Reed Larson scored two goals each in the defeat of Los Angeles.

The Kings' Marcel Dionne became the NHL's second all-time leading scorer with 1,591 points when he drew an assist on a goal by Jay Wells in the first period. Dionne entered the game tied with Phil Esposito. The career leader is Gordie Howe, with 1,850 points. Blues 3, Red Wings 2

In Detroit, defenseman Lee Norwood scored his fifth goal of the season at 2:49 of overtime to give St. Louis the victory.