Their opening try came via the more direct route with flanker Johan Bardoul crashing over for the early lead. Matt Golding converted the first of seven successful kicks from as many attempts, and his all-round performance in both the No9 and 10 jerseys was a standout.
Leading 13-3 at the break, Mount Maunganui never looked like letting Tauranga back into the game. A Golding penalty stretched the lead to 16-3 before the final 20 minutes was all one-way traffic, as Mount Maunganui's skillful backline cut loose.
Promising centre Chris Croadsdale showed an eye for the gap and plenty of pace, as he crossed for two tries, with the final bonus-point try coming from replacement Sam Hughes.
Neither side has time to dwell on the result with a further round of matches today but the bumps and bruises will feel much worse for the Tauranga boys as they desperately try to get their season back on track away to Te Puna.
Mount Maunganui captain David Smart says the win was sweet revenge after three losses on the trot to Tauranga, including last year's final.
Mount Maunganui Sports 37 (Chris Croadsdale 2, Johan Bardoul, Sam Hughes tries; Matt Golding 4 cons, 3 pens); Tauranga Sports 3 (Paul Morris pen).