for that period you you gain no extra info from the marriage cert than hiring the film from your LDS FHC and transcribing the entry - the marr certs are produced from the same official transcript of the parish regs - if you are on Island then the manx museum has a copy of the film
at that period all you will get are the witnesses names (possibly useful tho in many parishes these were often the parish clerk + a warden) that the married by licence (99.9% did) if they could sign their own names and if either partner under age or a widow/widower