St George's remain unbeaten, Corinthians hit six against Douglas Royal
Goals from Ciaran McNulty and Joey Morling were enough to give St George's maximum points whilst ending Rushen's unbeaten home run in the process.
They struck either side of half time to earn their fourth win of the season.
It was another good day for Douglas Athletic, who saw off Castletown 3-0 and move up to second in the table.
Tom Weir netted a late winner as Old Boys claimed victory away at Marown.
At Ballafletcher, Sean Doyle moved into double figures for the season as his hat-trick helped Corinthians to a 6-0 win over struggling Douglas Royal.