Inspecting And Replacing Tank Vent - Echo CS-600 Service Manual

26

4-4 Inspecting and replacing tank vent

B
FUEL SYSTEM
A
A
NOTE: Tank vent prevents a vacuum from forming
in fuel tank when fuel in fuel tank is being con-
sumed. When pressure in fuel tank becomes too
high, tank vent releases the pressure.
1. Remove cleaner lid and air fi lter. Remove tank
vent (A) from fuel tank and connect Pressure /
vacuum tester 91139 (B).
2. Apply pressure approx. 49 kPa (0.5 kgf/cm
psi). Make sure pressure is stable in range of 9.8 -
39.2 kPa (0.1 - 0.4 kgf/cm
3. If it is not in the range, gently clean tank vent
with compressed air or replace with new one.
NOTE: Do not disassemble valves in tank vent as-
sembly. Damage to valves will occur.
4. Apply negative pressure 19.6 kPa (0.2 kgf/cm
psi).
5. Tank vent should pass air freely without holding
any pressure. If it does not, replace tank vent with
new one.
CS-600
2
) (7
2
) (1.4 - 5.7 psi).
2
) (3