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.
• 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.
• Do not use Biocide.
• Do not use kerosene or residual fuels.
Handling of Diesel Fuel
1. Water and dust in the fuel may cause
engine failure. When fuel is stored, be
sure that the inside of the storage
container is clean and dry, and that the
fuel is stored away from dirt or rain.
0004512
Figure 1
2. Keep the fuel container stationary for
several hours to allow any dirt or water to
settle to the bottom of the container. Use
a pump to extract the clear, filtered fuel
from the top of the container.
Diesel Fuel Lines
Install the lines between the fuel tank and the
fuel injection pump.
Be sure to install a drain cock
(Figure 2, (5)) at the bottom of the fuel tank
to remove water and contaminants.
Install a fuel filter / water separator
(Figure 2, (2)) and a fuel filter between the
fuel tank and the fuel injection pump.
0002050
(1)
(4)
(5)
(7)
(8)
(9)
(10)
(2) (3)
(6)
Figure 2
1 – Fuel Priming Pump
2 – Fuel Feed Pump
3 – Fuel Filter / Water Separator
4 – Fuel Return Line
5 – Fuel Tank
6 – Fuel Tank Drain Cock
7 – Approximately 50 mm (1.95 in.)
8 – Fuel Shutoff Valve
9 – Less Than 500 mm (19.68 in.)
10–To Fuel Injection Pump
BEFORE YOU OPERATE
6LY3 LDC Operation Manual
25
© 2008 Yanmar Marine International