They ran in eight tries to two to dispatch Mt Aspiring 52-12 in Wānaka on Saturday.
Waitaki, who had played King’s in the traditional interschool during the week, led 19-7 at the break but kicked it up a notch in the second spell.
The Newlands-Carter brothers, Ned (two) and Ike, scored three tries between them.
Both are busy loose forwards.
Second five Chase Kennedy was impressive. He showed tremendous vision and his kicking and passing game caused Mt Aspiring endless problems on defence.
Centre Matthew Poasa, who picked off an intercept try, ran some nice lines and defended strongly.
Waitaki coach Shane Carter was thrilled with the performance.
"The first half was a bit scrappy," he said.
"I thought Mt Aspiring played extremely well. They hooked into everything and gave it a go.
"It took us a while to get ourselves under way, but in the second half we kind of controlled the ball reasonably well, and obviously put a few more tries on."
South Otago recorded a 21-17 win over Hokonui Colleges, and Dunstan beat Taieri 24-0.
St Kevin’s beat Cromwell 43-36 in Oamaru.
On Thursday, Central Southland knocked over one of the traditional heavyweights edging John McGlashan 19-17 in Winton.
Central Southland had slipped behind 12-0 but rallied with three tries. McGlashan scored late but missed the conversion, which would have drawn the game.
In the breakaway South Island Boys’ Schools competition, Southland Boys’ suffered a rare home defeat, losing 28-22 to Christchurch Boys’, and King’s fell 41-24 to Timaru Boys’ in Dunedin.
Otago Boys’ play Christ’s College in Dunedin today.
