Two goals from skipper Paul Jones and one from Neil Curphey booked Rushen a place in the first round of the Cu-Plas FA Cup.
The Railway Cup holders started their FA Cup run with a 3-1 victory at Gymns.
There was also an away win – and an emphatic one at that – in the preliminary round of the GH Corlett Woods Cup.
A double from Michael Dawson and one each from Gregg Wood, Barry English, Dave Priestnal and Spencer Bell secured Pulrose a 6-1 success at Foxdale.
Netball: Castle Rushen scoop three secondary school titles
The Southern school won the coveted Senior Final
Hockey: Valkyrs looking to stay in title Ladies Premier League title fight
Rearranged fixtures taking place tonight
Shooting: Dave Corlett shows the way
'Ideal' conditions at Meary Veg
Hockey: Under-14 boys heading to England Championship final
First Manx side to compete for a tier 2 trophy
TT 2026: 20-year-old to make debut this summer
Rhys Stephenson to make first appearance on the Mountain Course