Quicksilver 35-8M0162830 4-Stroke Outboard Oil Filter This high-quality oil filter is works with Quicksilver fourstroke outboard oil to provide your engine with outstanding protection. It is recommended that you change your fuel filter after every 100 hours of normal use or minimally once per season. Application Information MercuryMariner 25HP FourStroke Carb, MY2006 prior 30HP FourStroke 3 cyl. MY2005 prior All 40 - 60HP FourStroke Outboards MY 1998 Newer All 75 - 115HP FourStroke Outboards U