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Outboard 101

How to Change Mercury 75 HP 2.1L Lower-Unit Gear Oil

Quick Answer: On a Mercury 75 HP 2.1L FourStroke, the lower fill/drain plug sits behind the propeller. Remove the prop, inspect the shaft seal area, open the upper vent, drain...

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How to Replace a Mercury 75 HP Water Pump Impeller

Quick Answer: Replacing the water pump impeller on a Mercury 75 HP FourStroke requires removing the gearcase, opening the pump around the driveshaft, inspecting the housing and wear plate, installing...

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