New Zealand set Ireland a target of 290 to win the second match of the ODI tri-series in Dublin with Neil Broom top scoring for the Blackcaps with 79.
Ireland captain William Porterfield won the toss for the second successive match and although the wicket is not as green as the one served up against Bangladesh, he once again asked the tourists to bat.
The Blackcaps, with 10 players away at the Indian Premier League, named two new caps in opening bowler Seth Rance and bowling all-rounder Scott Kuggeleijn while Ireland also gave a debut to off-spinning all-rounder Simi Singh, who came in for Stuart Thompson.
Luke Ronchi got the innings off to a fast start with 37 from 26 balls before he got a leading edge to a pull shot and was caught at point.
The wicket-taker was Barry McCarthy, who can surprise batsmen with his pace, and as a result he has a habit of taking wickets in his first two overs.
This one came from his 11th delivery and three balls later he had his second when captain Tom Latham was caught behind for 15 to leave New Zealand 55 for two in the 10th over.
George Worker and Ross Taylor, however, were untroubled in the next 20 overs as they added 84 for the third wicket. Worker, in only his third international, was the more patient while Taylor scored at almost a run-a-ball.
Both reached their 50s, but both were out immediately afterwards, Taylor caught by the Irish captain at point and Worker, whose 50 took 88 balls, with just three fours, caught at deep mid-wicket.
Broom however, with 79 from 63 balls with nine fours and a six, ensured a big finish for New Zealand, who scored 130 off the last 15 overs.
The pick of the Ireland bowlers was Kevin O'Brien with one for 46 and although George Dockrell, the only spinner used, finished wicketless, he conceded only 42 runs.
Peter Chase could not continue his good early season form, going for 74 runs and taking his only wicket in the last over.