Donna
Margaret Crowe Ch 15th October 1833 in Bride is the Daughter of John Crowe/Margaret Sayle. I agree with your Maughold census for 1851 01-05-16 allthough the ages don't tally.
I believe the margaret we are looking for is in Marown 1-15-50 in 1851 possibly a worker living in, i don't have the full entry.

IGI batch C038021 John Caine s/o Robert Caine/Margaret Crow 28/11/1853 Bra - Died 17/12/1853
John Henry Caine s/o Robert Caine Margaret Crowe 30/03/1855 Bra
Margaret Ann Caine d/o Robert Caine /Margaret Crowe 17/05/1867 Bra
Robert Caine s/o Robert Caine/Margaret Crow 17/05/1862 Bra
Will advise if i find any more information.

Tom