Yanmar 6BY2 - Diesel Fuel; Diesel Fuel Specifications

GENERAL SERVICE INFORMATION
Diesel Fuel
3-12 BY Service Manual
© 2009 Yanmar Marine International
DIESEL FUEL
Diesel Fuel Specifications
Diesel fuel should comply with the following
specifications. The table lists several specifications
for diesel fuels.
Additional Technical Fuel Requirements
• The fuel cetane number should be equal to 48 or
higher.
• The sulfur content must not exceed 0.3% by
volume. Less than 0.05% is preferred.
• Water and sediment in the fuel should not exceed
0.05% by volume.
• Ash content not to exceed 0.01% by mass.
• 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.
• NEVER mix kerosene, used engine oil, or
residual fuels with the diesel fuel.
• NEVER use Biocide or mix winter and summer
fuels.
• 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.
Biodiesel Fuels
Yanmar approves the use of biodiesel fuels that do
not exceed a blend of 5% non-mineral oil based
fuel with 95% standard diesel fuel. Such biodiesel
fuels are known in the marketplace as B5 biodiesel
fuels. B5 biodiesel fuel can reduce particulate
matter and the emission of “greenhouse” gases
compared to standard diesel fuel. NOTICE: If the
B5 biodiesel fuel used does not meet the approved
specifications, it will cause abnormal wear of
injectors, reduce the life of the engine and it may
affect the warranty coverage of the engine.
The biodiesel fuels must meet the minimum
specifications for the country in which they are
used:
• In Europe, biodiesel fuels must comply with the
European Standard EN14214.
• In the United States, biodiesel fuels must comply
with the American Standard ASTM D-6751.
Biodiesel should be purchased only from
recognized and authorized diesel fuel suppliers.
DIESEL FUEL
SPECIFICATION
LOCATION
No. 2-D, No. 1-D,
ASTM D975-94
USA
EN590:96 European Union