Lock Josh Eden-Whaitiri, who isn't in the Mitre 10 Cup squad, was a tireless worker in the host pack. Winger Mason Emerson was thirsty for work and his burst from deep inside the Magpies red zone led to No 8 Fa'alemiga Selesele's try in the 58th minute.
Halfback Ellery Wilson proved it won't be long before he is back to his best after missing most of the club season. Both first five-eighths Tiaan Falcon and Ihaia West operated well while centre Jonah Lowe was courageous on defence.
Magpies injury concerns after the match were former All Black lock Ross Filipo with a hamstring strain, blindside flanker Trent Boswell-Wafefield with a shoulder injury and prop Tolu Fahamokioa with a hip injury.
Harbour wingers Afa Faatau and Tevita Li were always a threat. Blindside flanker Dylan Lam was the pick of the Harbour forwards.
North Harbour had earlier beaten Auckland 45-21 and Northland 64-10 in pre-season fixtures.
Scorers:
North Harbour 17 (Afa Faatau, Dylan Lam, Bryn Hall tries; Matt McGahan con), Hawke's Bay 14 (Jorian Tangaere, Fa'alemiga Selesele tries; Tiaan Falcon 2 cons). HT: 17-0.