Mercury D2.8L D-Tronic Specifications Page 67

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SPECIFICATIONS
SECTION 4
CMD-4081850 / 90-860094030 SEPTEMBER 2003 Page 59
CE16
Diesel Fuel In Cold Weather
Unaltered diesel fuels thicken and “gel” in cold temperatures, unless treated. Virtually all
diesel fuels are “climatized” to allow their use in the particular region for that time of the year.
If it becomes necessary to further treat diesel fuel, it is the owner/operator’s responsibility
to add a commercial “standard brand” “anti-gel” diesel fuel additive, following that product’s
directions.
CE440
Anti-Freeze/Coolant
CAUTION
Alcohol or Methanol base antifreeze or plain water are not recommended for use in
closed cooling section of cooling system at any time.
Because diesel engines are high compression engines and related higher engine operating
temperatures are created, the closed cooling system and engine, including related cooling
passages must remain as clean as possible to provide adequate engine cooling. This can
only be assured by using the proper anti-freeze, water, additives and inhibitors. It is
recommended that the closed cooled section of the cooling system be filled with a low
silicate formula of ethylene glycol antifreeze in solution with deionized water. A low silicate
formula prevents antifreeze separation which causes a silicate gelatin to form. This gelatin
will block engine and heat exchanger passages causing engine overheating.
The coolant, if not premixed, should be mixed before being added to the closed cooling
system using a proper anti-freeze together with deionized water. Common tap water or
softened water contains unwanted minerals which can leave large deposits in the system
that restrict the cooling system efficiency. In addition, additives and inhibitors introduced into
acceptable coolant solutions will form a protective film on internal passages and provide
protection against internal cooling system erosion.
The closed cooling section should be kept filled year-round with an acceptable
anti/freeze/coolant solution. Do not drain closed cooled section for storage, as this will
promote rusting of internal surfaces. If engine will be exposed to freezing temperatures,
make sure that closed cooled section is filled with a properly mixed antifreeze/coolant
solution, to protect engine and closed cooling system to lowest temperature to which they
will be exposed.
IMPORTANT: The anti-freeze/coolant used in these marine engines must be a low sili-
cate ethylene glycol, containing special additives, and deionized, purified water. Us-
ing 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 know-
ing that they are compatible. Refer to the coolant manufacturer’s instructions.
Some acceptable types of anti-freeze/coolants are listed in the following table. Refer to
SECTION 5 - Maintenance Schedules for respective change intervals.
Description
Part Number
Marine Engine Coolant 92-813054A2
Fleetguard Compleat (Product 91-50663 With DCA4 Additive) Obtain Locally
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