Mercury MerCruiser 5.7 Horizon, User Manual

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Section 5 - Maintenance
Page 64 90-899883173 DECEMBER 2007
Engine Oil
Checking
NOTICE
Discharge of oil, coolant, or other engine/drive fluids into the environment is restricted by
law. Use caution not to spill oil, coolant, or other fluids into the environment when using
or servicing your boat. Be aware of the local restrictions governing the disposal or
recycling of waste, and contain and dispose of fluids as required.
1. Stop the engine. Allow the oil to drain into the oil pan for approximately five minutes
with the boat at rest in the water.
2. Remove the dipstick, wipe clean, and reinstall fully into the dipstick tube. Wait 60
seconds to allow trapped air to vent.
NOTE: Install the dipstick with oil level indication marks facing the rear of the engine
(flywheel end).
33139
Possible dipstick locations
3. Inspect the dipstick reading, which should indicate a level between the full or "OK" mark
and the "ADD" mark. Reinstall the dipstick into the dipstick tube. If the oil level is low,
refer to
Filling
.
Filling
IMPORTANT: Do not overfill the engine with oil. Always use the dipstick to determine the
exact quantity of oil or fluid required.