Mercury - Fuel Filter Filtration Component Polymer & Mesh Screen 889527A07. Overview. Every boater knows that smooth days on the water start with an engine you can trust. The Mercury 889527A07 Fuel Filter brings that steady kind of confidence to the smaller outboards so many of us rely on for fishing trips, family cruises, or quiet mornings on the lake. It's not the kind of part you think about often, but when you do, you're grateful it's doing its job. There's comfort in knowing your motor is b