The main propulsion diesel engines on the fishery research vessel to which you are assigned are fitted with mechanically operated and controlled unit injectors. When are the sintered metal supply and return injector filters typically replaced?

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Accepted Answer

Whenever the unit injectors are removed for reconditioning.

Answer

Whenever the fuel system primary suction strainer is cleaned.

Answer

Whenever the fuel system secondary filter elements are replaced.

Answer

Whenever the coalescing fuel filters are drained of sludge and moisture.

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