Genoa, Ramilles 1825, Bramble 28. Looks as if he left the service 1847? described as a mariner on childrens baptism records, living Milford(Haven), in parish of Steynton, (now part of Milford Haven), married Sarah Child there on 7th April 1822, 8 children, eldest described as dumb on census.
What info have you so far? don't want to duplicate what you already have.
If he joined as a boy sailor he probably came from a poor family. Will keep looking for his baptism.