Onchan surprised Ayre United in the GH Corlett Woods Cup preliminary round.
Craig Marsh, Mark Burman, Gerard Colligon and Mark Rees were on target in a 4-2 home win.
Phil Quayle and Elliot Cureton replied for the Tangerines.
Douglas Athletic are up to fifth in JCK Division Two after an 8-1 thrashing of Braddan.
A Josh Green treble, a Liam Dawson double and further goals from Darren Shields, Andy Newton and Stuart Monks (penalty) secured the three points to lift them above Colby in the table.
LIVE: 2026 Commonwealth Games
Live coverage from Glasgow from 23 July to 2 August
Commonwealth swimming team to blend debuts with experience
It'll be the biggest of the Manx squads to compete in Glasgow
Commonwealth Games athletics squad in positive mood ahead of Glasgow
Five competitors - including three debutants - set to be involved
FC Isle of Man get pre-season underway with summer festival
Ravens get first runout ahead of new season
