Osea Vakatalesau put the home side ahead after just eight minutes before Alvin Avinesh and Jone Vonu Junior assured the victory with a goal each in the second half.
Lautoka now have nine points from their four matches with Hekari and Tafea both on seven points while Solomon Islands representatives Marist FC are still yet to pick up a point in the competition.
With just two match days left to decide the O-League finalists, Lautoka coach Imdad Ali says he is pleased with how his team is placed.
"I am happy with the win because it keeps us in contention for playing in the home and away O-League final," said Ali.
"We missed a lot of chances in the game and should have scored more but I am pleased with the result."
In other O-League action yesterday, Auckland City gained maximum points against AS Manu Ura in Tahiti with goals to Ian Hogg and Daniel Koprivcic while Hekari thrashed Tafea 4-0 in front of their home crowd as Solomon Islands import Alick Maemae claimed a double and Tuimasi Manuca and Joachim Waroi also got