Quicksilver MercuryMercruiser 35-866340Q03 Oil Filter The MercuryMercruiser Quicksilver 866340Q03 Oil Filter fits all Mercury MerCruiser and Mercury inboard engines, except V-6 models with the filter mounted on the engine block. This oil filter features a metal shell that is over 50 thicker than conventional filters with a durable paint finish to resist corrosion even in saltwater environments. Using the Quicksilver Mercruiser Oil Filter, Wholesale Marine recommends that you change your oil filt