FUEL FILTER 35-8M0149607

Function and technical context

This fuel filter is an essential component of the fuel supply system on MerCruiser and Mercury Mariner engines. Its function is to retain impurities, rust particles and contaminants present in the fuel tank, guaranteeing that only clean fuel reaches the carburetor or the electronic injection system. A clogged or defective filter compromises fuel circulation, causing irregular idling, progressive loss of power, cold starting difficulties and, in severe cases, engine stoppage while sailing. Effective filtration is especially critical on boats, where water and sediment can infiltrate the fuel during refueling or due to internal tank corrosion.

When to replace this part?

It is recommended that the fuel filter be inspected each boating season and replaced every 100-200 hours of engine operation, or sooner if symptoms such as hesitant acceleration, abnormal fuel consumption, or difficulty maintaining a constant cruising speed are observed. If the engine remains inactive for months, it is advisable to change the filter at the beginning of the campaign to avoid problems caused by chemical degradation of the stored fuel. Preventative replacement is a minimal investment that prevents costly power system repairs and ensures reliability at sea.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers