Mercury – Inline Fuel Filter | Fuel System Protection | Marine-Grade Construction | 864572Mercury Inline Fuel Filter Fuel System Protection Marine Grade Construction 864572 Overview Ask anyone who spends their weekends on the water and theyll tell youclean fuel is everything. A boat can look great, sound great, and even run great right up until a little debris sneaks its way into the fuel system. Thats when the day takes a turn. With the Mercury Marine 864572 Inline Fuel Filter, you get the kind of quiet reassurance every boater