MAINTENANCE
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 1B-17
Engine Oil
CAUTION
ENVIRONMENTAL HAZARD! Discharge of oil or oil waste into the environment is
restricted by law. Do NOT spill oil or oil waste into the environment when using or
servicing your boat. Contain and dispose of oil or oil waste as defined by local
authorities.
To help obtain optimum engine performance and to provide maximum protection, the engine
requires engine oil with a rating of HD-SAE-API CG-4 and CH-4.
We strongly recommend the use of:
MERCURY DIESEL ENGINE OIL QUICKSILVER HEAVY DUTY ENGINE OIL
These oils are both specially blended 15W-40 oil with Marine Additives, for all temperature
operation. They both exceed requirements for API CH-4, CF-4, CG-4 and CF-2 oils.
Other recommended oils:
SHELL MYRINA TEXACO URSA SUPER TD VEEDOL TURBOSTAR
MOPAR WINTERSHALL MULTI-REKORD WINTERSHALL VIVA 1
These oils are approved by Mercury Marine and Marine Power Europe. For all temperature
operation use 15W-40 oil.
Oil Level
OVERFILLED ENGINE CRANKCASE
An overfilled crankcase can cause a fluctuation or drop in oil pressure on Mercury
MerCruiser engines. The over-full condition results in the engine crankshaft splashing and
agitating the oil, causing it to become aerated. The aerated oil causes a loss of engine
performance and an increase in crankcase backpressure. An extreme overfill condition
could result in large amounts of oil being drawn into the intake.
Care must be taken when checking engine oil level. Oil level must be maintained between
the minimum oil level mark and the maximum mark on the dipstick. To ensure that you are
not getting a false reading, observe the following before checking the oil level.
• Boat at rest in the water, or if boat is on a trailer, raise or lower bow until the boat is
setting like it does at rest in the water.
• Allow ten minutes for oil to drain into the oil pan if engine has just been operated or
oil has just been added.
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