My Mercruiser Bravo III has a fuel filter which has the words "Mercruiser Fuel Filter" written on a black canister that looks like an oil filter. Is there a filter element that goes into this housing so that the outside canister remains after it is changed? I know that when changing an oil filter the whole canister is changed out. I asked my marina to change the filter and I put a piece of tape on it to know when it was changed. I received a bill for the service but the tape is still in place on the original filter. Could the inside element have been changed without replacing the entire housing?