First half goals from Sid Warden, back after 6 weeks out from a toe operation and debutant 16 year old Seth Crabbe, who impressed throughout, set Margate on their way.
The game was sewn up early in the second half, when an outstanding through ball from Warden found Harrison Hume who slotted past the onrushing keeper.
This sets up a clash in the next round against Faversham Town, with U23s looking for revenge following their 0-2 defeat to the same opposition on the opening day of the league campaign.
Margate: Waller, Matthews, Hulett, Dockwray, Mallon, Dowling, Hume, Warden (c), Richards, Ghali, Crabbe
Webster, Rai, Bird, Miller, Nwanosike