Mercury 135 Verado Manual page 43

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 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 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).
FUEL AND OIL
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