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Bleed Air from the Fuel System
Air in the fuel system may make the engine hard to start or
make it run irregularly.
After draining water and sediment from the fuel filter,
replacing the fuel filter, cleaning the solenoid fuel pump
strainer or running the fuel tank dry, be sure to bleed the air
from the fuel system.
Main Points to Bleed Air
This machine is equipped with a solenoid fuel pump.
d
CAUTION: Fuel leaks may lead to fires.
1. Check that fuel cock (1) on the bottom of the fuel tank is
opened.
2. Turn the key switch ON and hold it in that position for
approx. 3 minutes. Thereby, the solenoid fuel pump
operates, starting to bleed air.
3. While holding the key switch in the ON position,
reciprocate fuel main filter priming pump (2). After air is
bled from the main filter, return priming pump (2) to the
original position.
4. After the main filter is filled with fuel, hold the key switch
in the ON position for 30 seconds.
5. Start the engine. Check the fuel supply system for fuel
leaks.
IMPORTANT: Even if air is not thoroughly bled, do not
hold the key switch in the ON position for more than 5
minutes. In case air is not thoroughly bled, first return
the key switch to the OFF position. Then, after waiting
for more than 30 seconds, turn the key switch to the
ON position again. Failure to do so may cause damage
to the solenoid fuel pump and/or discharging the
batteries.
MAINTENANCE
2
7-55
1
2
M1U4-07-042
ZX135US-5B
MDAA-07-007
M81U-07-030
ZX225US-5B,
225USLC-5B
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