“We could have been 4-0 up at halftime,” Adams said.
Several one-on-one chances came to nothing, a header went over the top and another that was going in at the corner was cleared in a fingertip save by the keeper. He couldn’t remember Moturoa having a goalscoring chance in the first half.
United had two or three chances in the second spell and Moturoa also went close with an effort that hit the bar, but no goals were added in the last quarter of the game.
For United, right-winger Jacob Adams caused problems for the Moturoa defence and elder brother Corey set up play well from midfield.
Dane Thompson won ball in the air and on the ground in the middle of the park while Aaron Graham had a good game in a defensive midfield role and Kieran Higham shone at sweeper.
In the last few minutes of the match tempers flared, and United defenders Jonathan Purcell and Higham were sent off and a Moturoa player was shown the yellow card.
In the other semifinal, Taradale beat Napier City Rovers Reserves 4-2 in Taradale.
Eastern League 1 leaders United, who have won eight from eight, are back in home action this Saturday against Gisborne Thistle Youth A.
Meanwhile, Electrinet Gisborne Thistle, who had a bye in the Central Federation League last weekend, host third-placed Palmerston North Marist at Childers Road Reserve on Saturday.
Thistle are sitting sixth on the nine-team table headed by Havelock North Wanderers.