Cian Collins latched on to a through ball from Shaun Kelly two minutes into his debut to set Limerick on their way to victory over struggling Cork City at Jackman Park.
Dave Ryan pulled off two good saves to deny Gavin Kavanagh and Jamie Murphy before Sean Brosnan doubled Limerick's lead seven minutes after the break, with a superb volley from a cross by former Cork City favourite Denis Behan.
David O'Leary headed home Limerick's third two minutes into injury-time.
Limerick -- Ryan, Kelly, Gutherie, Treacy, Tracy, Gamble, Bradley (O'Leary 71), Gaffney, Brosnan (Sheedy 67), Coughlan, Collins (Behan 37 ).
Cork City -- Burns, Turner, Murphy, Kavanagh, Healy (O'Neill 75), Sullivan (Purcell 75), O'Connor, Dunleavy, Murphy, Lordan, Murphy (Duggan 67).
Ref -- J McKew (Tipperary).