Yanmar 4JH3-TE, Operation Manual

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20 3. BEFORE OPERATION
3.2 Supplying Fuel
Fires from Oil Ignition
• Be sure to use the correct type of fuel when refueling.
Mistakenly filling with gasoline or the like will result in ignition.
• Be sure to stop the engine before refueling.
If you spill fuel, wipe such spillage carefully.
• Never place oils or other flammable material close to the engine as this
could result in ignition.
3.2.1 Filling the Fuel Tank
Fill the tank with clean fuel which has not been contaminated with water or dust.
Fill the tank to approximately 90% of its capacity, and take care not to let the fuel spill over during operation.
3.2.2 Bleeding the Fuel System
Bleed the fuel system according to the following procedure. When there is air in the fuel system, the fuel
injection pump will not be able to function.
1. Check the amount of fuel in the fuel tank. If insuffi-
cient, replenish.
2. Open the fuel cock of the fuel tank.
3. Loosen the air bleeding bolt on the top of the fuel filter
by turning it 2
∼
3 times with a minus driver.
4. Feed the fuel with the priming pump.
The priming pump is on the top of the fuel filter.
Move the priming pump knob up and down until fuel
mixed with air bubbles flows out of the air bleeding
bolt.
5. When the fuel coming out is clear and not mixed with
any bubbles, tighten the air bleeding bolt.
Priming pump
To
fuel injection pump
From fuel tank
Air bleeding bolt