Irish team mates Shane Lowry and Niall Kearney remained on course to clash in the final of the West of Ireland championship at Rosses Point.
Defending champion Lowry beat Malahide's Gavin O'Connor 2&1 and faces Strandhill's Tommy McGowan in this afternoon's quarter-finals.
South of Ireland champion Kearney beat Michael Sinclair by one hole to clinch a last eight showdown with Limerick veteran Pat Murray.
West of Ireland Amateur Open
Jim Mulready (Castle) bt James Monaghan ( Island) 4/2
Cian Curley (Newlands) bt Michael Hearn ( Chorley, UK) 1 hole
Tommy McGowan (Strandhill) bt Chris Drumm (Rosslare) 19th
Shane Lowry (Esker Hills) bt Gavin O’Connor (Malahide) 2/1
Niall Kearney (Royal Dublin) bt Michael Sinclair (Knock) 1 hole
Pat Murray ( Limerick) bt Luke Lennox ( Moyola Park) 3/2
Alan Dunbar (Rathmore) bt Kelan McDonagh (Athlone/NUIM) 6/5
David Corsby (Royal Lytham) bt Jonathan Hurst ( Shawhill, UK) 3/1
Mulready v Curley
McGowan v Lowry
Kearney v Murray
Dunbar v Corsby