Mercury 80 Owner's Manual page 29

IMPORTANT: Do not try to fill the oil level to the top of the operating range (cross hatched region). Oil level is
correct as long as it appears in the operating range (cross hatched region).
a
a - Oil level operating range
6. If the oil level is below the operating range (cross hatched region), remove the oil filler cap and add
approximately 500 ml (16 oz.) of the specified outboard motor oil. Allow a few minutes for the added oil
to drain to the oil sump and recheck the dipstick. Repeat the process until the oil level is on the operating
range (cross hatched region). Do not try to fill to the upper end of the operation range (cross hatched
region).
IMPORTANT: Inspect oil for signs of contamination. Oil contaminated with water will have a milky color to it;
oil contaminated with fuel will have a strong fuel smell. If contaminated oil is noticed, have the engine checked
by your dealer.
7. Push the dipstick back in all the way.
8. Reinstall the oil fill cap hand-tight.
9. Reinstall top cowl.
FUEL AND OIL
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