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I also searched for James McKinney died 1885 Carrickfergus and found the same records as sinann. Searching for James McKinney under Larne registration district (Carrickfergus is a sub-district) brings only 2 entries- the other is a James McKinney aged 41 died 1876.
He died at North East Division, was a farmer and a widower-
https://civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1885/06291/4802937.pdfNothing for this James listed in PRONI Will Extracts or Irish Calendar of Wills and Administratons but there is a much later McKinney farming in the same place much later, possibly a descendant-
McKinney David Legg of North East Division Carrickfergus county Antrim farmer died 30 March 1923 Probate Belfast 6 June to Alexander Miscampbell J.P. and Samuel Mackay retired farmer. Effects £219 0s. 10d.Here's the location of North East Division-
https://www.townlands.ie/antrim/carrickfergus-or-st-nicholas/carrickfergus/north-east-division/I also checked for James McKinney deaths in Belfast just in case he didn't die in Carrickfergus area (it's not that far from Belfast) but nothing even close there. Then checked all Ireland and again nothing close to the details you've posted.
