Engine Oil; Engine Specifications - Mercury TDI 4.2L Manual

Only premixed, coolant should be added to the closed‑cooling system. Additives and inhibitors introduced into acceptable
coolant solutions will form a protective film on the internal passages and provide protection against internal cooling system
erosion.
Do not drain the closed‑cooling section for storage. The closed‑cooling section should be kept filled year‑round with an
acceptable antifreeze/coolant solution to avoid rust forming on the internal surfaces. If the engine will be exposed to freezing
temperatures, ensure that the closed‑cooling section is filled with a properly mixed antifreeze/coolant solution to protect the
engine and closed‑cooling system to the lowest temperature to which they will be exposed.
NOTE: It is recommended that a 50/50 solution of coolant (antifreeze) and deionized, purified water be used. A 50/50 solution
will provide freeze protection to –35° C (–31° F). Decreasing the solution to 40/60 will provide freeze protection to –25° C
(–13° F). Even in the warmest climates, never decrease the solution below 40/60. Increasing the solution to 60/40 will provide
freeze protection to –50° C (–58° F).
IMPORTANT: The antifreeze/coolant used in these marine engines must be a low silicate ethylene glycol, containing special
additives, and deionized, purified water. Using other types of engine coolant may cause fouling of the heat exchangers and
overheating of the engine. Do not combine different types of coolants without knowing that they are compatible. Refer to the
coolant manufacturer's instructions.
The acceptable antifreeze/coolants is listed in the following table. Refer to Section 5 ‑ Maintenance for respective change
intervals.
Description
Marine Engine Coolant

Engine Oil

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.
Engine oil must be 5W‑30 viscosity, and meet VW Standard 504 00/507 00.
We strongly recommend the use of:
Description
5W‑30 (1 L)
5W‑30 (4 L)

Engine Specifications

Engine type
Displacement
Firing order
Bore
Stroke
Rated engine RPM (refer to Conditions Affecting Operation
—Propeller Selection for additional information)
Idle RPM in neutral (engine at normal operating temperature)
Oil pressure at any engine
temperature
Thermostat
Coolant temperature
Electrical system
Battery*
Alternator
*Battery manufacturers may rate and test their batteries to different standards. MCA, CCA, Ah, and Reserve Capacity (RC) are
the ratings recognized by Mercury Marine. Manufacturers that use standards different than these, such as equivalent MCA, do
not meet Mercury Marine battery requirements.
90-8M0114081 DECEMBER 2015
eng
Description
750 RPM
3800 RPM
Water
Availability
Worldwide
NOTICE
Where Used
Engine crankcase
Engine crankcase
Refer to Performance Curve and Data Sheet TDI (available
at www.mercurymarine.com/engines/diesel/)
750 CCA, 950 MCA, or 180 mAh
Section 3 - Specifications
Part Number
8M0078028
Part Number
8M0069603
8M0069602
Specification
V8 diesel
4.2 L (252 cid)
1‑5‑4‑8‑6‑3‑7‑2
83.0 mm (3.27 in.)
95.5 mm (3.75 in.)
650 RPM
152–310 kPa (22–45 psi)
345–556 kPa (50–80 psi)
70° C (158° F)
70–85° C (158–185° F)
12‑volt negative (–) ground
120 A
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