John Joseph McNally Dublin 1870s

Researching my ancestors from Dublin.  Any help would be greatly appreciated.  They left Ireland 1884-1887 for the USA.

My grand father was: John Joseph McNally 

                                       Born: March 18, 1868 Ireland

                                       Died: June 25, 1940 in Mt. Pleasant, Westchester, New York, USA

John's death certificate shows, Place of Brith - Dublin, Ireland

His father was:            James McNally

                                       Born abt.  1844 Ireland

                                       Died  abt 1915 New York, USA

His mother was:          Margaret O'Brien

                                        Born abt 1845 Ireland

                                        Died  1887-1900 New York, USA

Arrival in the US very possibly April 25, 1885 in New York City on the ship Servia. Passanger list shows a James McNally and directly under him Maggie O'Brien.   Can not locate John McNally on that ship or any other although US census says John arrived in 1887.  Ship sailed from Liverpool and Queenstown.  I am not very confident that I have the correct imigration arrival time of 1885.

I  will update with more information.