Supplying Fuel; Filling The Fuel Tank; Bleeding The Fuel System - Yanmar 4LHA-HTP Operation Manual

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.
4LHA-DTP/-DTZP/-STP/-STZP
Open the cock on the fuel oil inlet pipe line,
and loosen the air bleeding bolt on the top of
the water/fuel oil separator (optional) by
turning 2~3 times using spanner. When fuel
with no air bubbles came out, tighten the air
bleeding bolt.
Loosen the priming pump knob turning
counter-clockwise and repeatedly push the
knob by hand to feed fuel oil to the fuel filter.
Loosen the air bleeding plug on the top of the
fuel filter using a spanner.
And release fuel from there until fuel with no
air bubbles comes out then tighten the air
bleeding plug.
Push down the priming pump knob and turn it
clockwise to fasten.
DANGER
Fuel
injection
pump
_ _
26
F.O. feed pump
priming knob
Air bleeding plug
Fuel filter