Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 23Get this manual

Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 23

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Changing Engine Oil Engine Oil Capacity U.SQuarts (3.0 Liters)
aCrankcase Oil Pump

,Remove Ihe oil fill cap (c) and add oil 10 10 proper operating level2 Idle engine for five minute