Ah Kuoi began his career in 1973 playing for Richmond in the Auckland Rugby League competition.
Ah Kuoi played stand-off in Hull's 24–28 defeat by Wigan in the 1985 Challenge Cup Final during the 1984–85 season at Wembley Stadium, London on Saturday 4 May 1985, in front of a crowd of 99,801,[6] in what is regarded as the most marvellous cup final in living memory,[7] which Hull narrowly lost after fighting back from down 12–28 at half-time.
In his last year with Hull, 1986 he also became assistant coach to Kenny Foulkes, before finishing his career by returning to Richmond before retiring at the end of the 1987 New Zealand season.
[5] That same year, he made the national Kiwi team, touring England and France during the World Cup series.
He represented the New Zealand "Kiwi" rugby league team from 1975 to 1985, achieving 28 test appearances.