Checking; Filling - Mercury MR504LB3 Manual

Section 5 - Maintenance
Checking engine oil level must be done carefully. The oil level must be maintained between the minimum and the maximum oil
level mark on the dipstick. To ensure that you are not getting a false reading, observe the following before checking the oil
level.
• If the boat is in the water, ensure that the boat is at rest.
• If the boat is on a trailer, raise or lower the bow until the boat is sitting as it does at rest in the water.
• Allow five minutes for the oil to drain into the oil pan if the engine has just been operated or oil has just been added.

Checking

IMPORTANT: Engine crankcase oil must be checked at intervals specified in Maintenance Schedules. It is normal for an
engine to use a certain amount of oil in the process of lubricating and cooling the engine. The amount of oil consumed depends
greatly upon engine speed, with consumption being highest at wide‑open throttle and decreasing substantially as engine speed
is reduced.
With the engine running, the crankshaft journals or rod journals may strike and break the dipstick, resulting in damage to
internal engine components. Stop the engine completely before removing or inserting the dipstick.
1. To check the engine oil level during operation, stop the engine and allow five minutes for the oil to drain into the pan.
2. Remove the dipstick. Wipe clean and install into the dipstick tube.
b
a
3. Remove the dipstick and observe the oil level. The oil level must be between the marks on the dipstick. If necessary, add
oil. Refer to Filling.
a
4. Install engine oil dipstick.

Filling

IMPORTANT: Do not overfill the engine with oil.
Page 46
c
b
NOTICE
2.0L engine oil service
c
a - Engine cover with access panel removed
b - Engine oil fill cap
c - Engine oil dipstick
27986
Engine oil level markings
a - Dipstick
b - Minimum operating level
c - Full mark and maximum operating level
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90-8M0089579 MARCH 2014
eng