Mercury 2.5 FourStroke Operation, Maintenance & Installation Manual page 31

NOTE: If oil level is at the lower mark, add 100 ml (3 oz.) of oil.
a
a - Oil level inspection window
b - Upper oil level
c - Lower oil level
3. Install the oil fill cap, and tighten securely.
a
a - Oil fill cap
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FUEL AND OIL
b
c
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