The Canada border crossing mentions his arrival in USA in 1913.
Arrival 26 June 1913 Boston, On ship Arabic
Martin Kilmartin, Age 24, Roman Catholic
Farm Labourer
Born Mountbellew Galway
Complexion Fair
Hair colour Brown
Eye colour Blue
Height 5 ft 6 inches
Last Residence - Mountbellew Galway
Nearest relative Father, Thomas in Mountbellew
This information suggests the birth record posted above by heywood is correct.
I wonder why he has reduced his age on emigration.
ADDED - His parents are also named on his marriage record to Phoebe.