PNG were slow to find their form while Tahiti dominated possession early on.
Anthony Tesquet had a chance to score first points for Tahiti but his penalty kick fell short.
PNG got the ball rolling midway through the first half when a break out on the wing saw Jacky Marcus dive over to score.
An unsuccessful conversion from Nigel Genia left the score at 5-0.
Genia got it right the second time, kicking a penalty goal to extend PNG’s lead.