Our West Marine Fuel Filter Funnel will not allow diesel fuel to flow past the filter element. The funnel was stored in a plastic bag below next to the through hulls, however, no water was in the bag/funnel. The filter element will not allow fresh fuel, without biocide and injector cleaner, to pass through the funnel. Has anyone experienced a similiar problem with their fuel filter funnel and how did you clean/unclog the filter element? The funnel is also sold under the Racor brand.