Geoff
As promised I've now traced James Stark from his entry into the CG Service from Berwick on Tweed on 14 March 1829 (Nomination No.1370), with a first posting to Mizen Head (Arklow), in Ireland.
On 19 April 1831 he was promoted to Commissioned Boatman, with a transfer to Elmly Ferry in Hampshire. On 3 August 1840 he moved to Pitts Deep, and then on 22 August 1849 to North Queensferry, from where he was discharged on a pension on 31 January 1861.
I believe I have found the family in the 1841 census at Pitts Deep, where he is shown as James Storke, with his occupations given as 'Under the Customs' (HO107/393/8), unfortunately Frances is not listed, but there are his wife and other children present.
From the GENUKI Coastguard site his birth is given as Berwick on Tweed, 1802.
Regards
Martin