In the game that saw Kenyan midfielder Amos Chona Ekhalie, 24, pick up his 22nd league games, host HJK had to come from a goal down to see off Mariehamn to boost their own chances of winning the 2012 Veikkausliiga.
Mariehamn opened the scores just the second minute with a goal from Aleksei Kangaskolkka. That goal was cancelled out by 24-year old Gambian striker Demba Savage as the game ended even after the first half.
Two minutes into the second half HJK went 2-1 up when Kosovo born midfielder Erfan Zeneli . Berat Sadik then made it 3-1 on 54 minutes before Juho Makela made it 4-1 five minutes after the hour mark.
Mariehamn course in the game all but ended when their lone goal scorer Aleksei picked up a second yellow on 76 minutes to be ejected from the game. For safety measure, Savage completed his brace on 88 minutes to end the scoring at 5-1.
Top of the pile is Inter Turku with 44 points.