A three-on-one resulting from another breakdown by the visitors made the score 5-1, with the Mount looking much fitter and faster than their counterparts.
The score threatened to blow out when the Mount hit on the counter attack to make it 7-1, but two late goals from the Pukekohe side meant the score was not too unflattering.
The win leaves Mount Maunganui in second place on the ladder with eyes firmly set on competition leaders Bayleys Otumoetai.
Mount Maunganui 8 (Brad McKenzie 2, Logan Thompson 2, Lincoln Churchill 2, Robert Lethbridge 2) Onewhero Pukekohe 3 (Kieran Coughey, Naresh Kana, Paul Rae)