Quicksilver Fuel Filter for Mercury Racing 525/565 EFI (35-848355)

The Quicksilver fuel filter (part #35-848355) is specifically designed for the legendary Mercury Racing 525 EFI and 565 EFI high-performance V8 engines – the powerhouse inboards used in racing boats and high-speed performance craft. As part of the fuel delivery system with a twin-stage (booster) fuel pump, this filter plays a critical role: it micro-filters the fuel to shield the sensitive fuel injectors from even the tiniest particles. In these 500+ HP engines running at extreme RPM, fuel cleanliness is paramount for achieving full power and avoiding engine damage.

The 35-848355 filter is a metal canister cartridge that resides inside Mercury Racing’s special inline fuel module. It’s engineered to withstand high fuel pressures and flow rates – especially in the 565 EFI, where the fuel system must deliver large volumes of gasoline at high pressure to each cylinder. Benefits: It provides ultra-fine micron filtration (much finer than standard outboard filters) without sacrificing flow. This ensures that at wide-open throttle, the engine receives all the fuel it needs, free of contaminants that could upset the delicate air-fuel mixture or harm the injectors.

Replacing this filter is part of the routine maintenance for Mercury Racing engines – Mercury recommends replacement annually or at specified hour intervals, as a clogged or old filter can rob the engine of performance. This part number 35-848355 has been superseded by #8M0050994 in later literature, indicating that this filter is the latest official revision for these engines. As a genuine OEM product, it guarantees full compatibility and maintains your engine’s warranty. For owners of boats with Mercury 525/565 EFI engines, using this OEM filter is the best way to ensure reliability under extreme operation and to safeguard your investment in a high-performance motor.