MERCURY GASOLINE FILTER 35-879885T REC35-879885T

Function and technical context

The in-line petrol filter is an essential component of the fuel supply system in petrol marine engines. Its main function is to retain particles of dirt, rust and contaminants that may have entered the fuel tank during refueling or due to internal corrosion, preventing these elements from reaching the injectors and the fuel pump. Working directly in the supply line between the tank and the engine, this filter protects the most sensitive components of the electronic fuel injection (EFI) system, ensuring a clean and constant fuel flow. Its correct operation is critical to maintain engine efficiency, prevent injector blockages and avoid misfires or loss of power.

When to replace this part?

The most common symptoms of a clogged fuel filter include difficulty starting, rough running at low rpm, loss of acceleration and, in advanced cases, engine stalling under load. It is recommended to check and replace the filter every 100-150 hours of operation or at least once a year in boats for recreational use, especially if the tank does not have a lid with a tight seal or if fuel of questionable origin has been refueled. A preventive replacement is highly advisable before the intensive sailing season, as it avoids emergency repairs at sea and guarantees the reliability of the engine under demanding conditions.

Engine Compatibility

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers