Quicksilver 883702Q Engine Block Mount Oil Filter - V-6 MerCruiser Stern Drive Engines Superior m-pleated cleansing filter media removes oil contaminants Produced to Meet Mercury marine original equipment Manufacturer specifications to best protect your mercruiser engine Features an anti-drain back valve to ensure start up lubrication and eliminate dry starts 50% thicker metal shell than conventional filters with a durable, corrosion resistant finish For v-6 mercruiser stern drive engines where the filter is mounted on the engine block