BEFORE YOU OPERATE
40 6LY3 Operation Manual
DIESEL FUEL
Diesel Fuel Specifications
Diesel fuel should comply with the
following specifications. The table lists
several worldwide specifications for diesel
fuels.
Additional Technical Fuel
Requirements
• The fuel cetane number should be equal
to 45 or higher.
• The sulfur content must not exceed 0.5%
by volume. Less than 0.05% is preferred.
• NEVER mix kerosene, used engine oil,
or residual fuels with the diesel fuel.
• Water and sediment in the fuel should
not exceed 0.05% by volume.
• Keep the fuel tank and fuel-handling
equipment clean at all times.
• Poor quality fuel can reduce engine
performance and / or cause engine
damage.
• Fuel additives are not recommended.
Some fuel additives may cause poor
engine performance. See your
authorized Yanmar marine dealer or
distributor for more information.
• Ash content not to exceed 0.01% by
volume.
• Carbon residue content not to exceed
0.35% by volume. Less than 0.1% is
preferred.
• Total aromatics content should not
exceed 35% by volume. Less than 30%
is preferred.
• PAH (polycyclic aromatic hydrocarbons)
content should be below 10% by volume.
CAUTION
• Only use the engine coolant
specified. Other engine
coolants may affect warranty
coverage, cause an internal
buildup of rust and scale
and / or shorten engine life.
• Prevent dirt and debris from
contaminating engine coolant.
Carefully clean the heat
exchanger cap and the
surrounding area before you
remove the cap.
• NEVER mix different types of
engine coolants. This may
adversely affect the properties
of the engine coolant.
0000006enTrans
DIESEL FUEL
SPECIFICATION
LOCATION
No. 2-D, No. 1-D,
ASTM D975-94
USA
EN590:96 European Union
ISO 8217 DMX International
BS 2869-A1 or A2 United Kingdom
JIS K2204 Grade No.2 Japan
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