Fuel Specifications - Kohler KD 625/3 Workshop Manual

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Maintenance - Prescribed lubricant - Refilling

FUEL SPECIFICATIONS

Danger – Attention
- To avoid explosions or fire outbreaks, do not smoke or use naked flames during the operations.
- Fuel vapours are highly toxic. Only carry out the operations outdoors or in a well ventilated place.
- Keep your face well away from the plug to prevent harmful vapours from being inhaled.
- Dispose of fuel in the correct way and do not litter as it is highly polluting.
To achieve optimum performance of the engine, use good quality fuel with certain characteristics:
Cetane number (minimum 51):
Viscosity (2.0/4.5 centistokes at 40°C): this is the resistance to flow and performance may decline if not within the limits.
Density (0.835/0.855 Kg/litre): a low density reduces the power of the engine, and density that is too high increases performance
Distillation (85% at 350°): this is an indication of the mixture of different hydrocarbons in the fuel.
Sulphur (maximum 0.05% of the weight): high sulphur content may cause engine wear.
The countries in which diesel normally has a low sulphur content are: Europe, North America and Australia.
Fuels for low temperatures
It is possible to run the engine at temperatures below 0°C using special winter fuels.
These fuels reduce the formation of paraffin in diesel at low temperatures.
If paraffin forms in the diesel, the fuel filter becomes blocked interrupting the flow of fuel.
Fuel can be: -
-
-
-
Aviation kerosene and RME fuels (biofuels)
The only Aviation fuels that may be used in this engine are: JP5, JP4, JP8 and JET-A if 5% oil is added.
For more information on Aviation fuels and Biofuels (RME, RSME) please contact the KOHLER applications department.
Capacities standard fuel tank
As for filters, tanks and special crankcases please refer to KOHLER instructions.
- 20 -
indicates the ignition quality.
A fuel with a low cetane number may cause problems when starting from cold and have a negative
effect on combustion.
and opacity of the exhaust
A high ratio of light hydrocarbons may have a negative effect on combustion.
In those countries where diesel has a high sulphur content, it is advisable to lubricate the
engine with a high alkaline oil or alternatively to replace the lubricating oil recommended
by the manufacturer more frequently.
PRESCRIBED LUBRICANT
Fuel with low sulphur content
Fuel with high sulphur content
Summer up to
Winter up to
Alpine up to
Arctic up to
For all fuel types, the cetane number cannot be lower than 51.
API CF4 - CG4
API CF - CD - CE
0°C
-10°C
-20°C
-30°C
KD Workshop Manual_cod. ED0053029350_1° ed_ rev. 00
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