Mercury 80 Owner's Manual page 59

CHANGING OIL FILTER
1. Place a rag or towel below the oil filter to absorb any spilled oil.
2. Unscrew old filter by turning the filter to the left.
3. Clean the mounting base. Apply film of clean oil to filter gasket. Do not use grease. Screw new filter on
until gasket contacts base, then tighten 3/4 to 1 turn.
a - Oil filter
OIL FILLING
1. Remove the oil fill cap and add the recommended oil to the midpoint of the operating range (midpoint of
the cross hatched region). Adding approximately 5 liters (5.3 quarts) will bring the oil level to mid point of
the cross hatched region.
2. Idle engine for five minutes and check for leaks. Stop the engine. Allow a few minutes for the oil to drain
to the oil sump and recheck the oil on the dipstick. Add oil if necessary.
MAINTENANCE
b
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a
20780
b - Loosen