Yanmar 1GM, Operation Manual

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V. Fuel and lubricating oil
[5-1.] Selection and handling of fuel oil
1) Choice of fuel oil Fuel oils available in countries other than those listed above
which are to equipment specification may be used. Use the chart at below to
determine correct grade of fuel.
United States ASTM/D975 No.1-D or No.2-D diesel oil
United Kingdom BS2869 Class A 1 or Class A 2
Air temperature Diesel/fuel (ASTM/D975)
Below 5°C (40°F) 1-D
Above 5°C (40°F) 2-D
1-a)
As further insurance of satisfactory operation, use fuel having less than 0.5% sulphur.
1-b)
For maximum filter life, sediment and water should not exceed 0.1 %.
1-c)
To maintain proper fuel delivery during cold weather operation, use grade No.1-D diesel fuel
as defined in ASTM Designation D975 with a pour point at least 5.6°C (10°F) below the
lowest outside air temperature.
1-d)
The cetane number should be 40 minimum.
Low atmospheric temperature, as well as high altitude operation, may require use of a fuel
with a higher cetane number.
2) Storing fuel Proper fuel storage is vitally important. Keep all dirt, water and other con-
taminants out of fuel. Avoid storing fuel over long periods of time. Store fuel in a convenient
place away from buildings.
Important
Presence of water or dust in the fuel may cause failure of the engine and
early wear of the fuel injection equipment. Water and dust in the fuel
tank should be removed and clean fuel used.
3) After each day's operation.
Fill fuel tank at the end of each day's operation. This prevents condensation in fuel tank as moist
air cools.