Chapter 8 Fuel System
Attention in Operation
Fuel is flammable and explosive under certain conditions. Ensure work area is well
ventilated. Do not smoke or allow open flames or sparks in the vicinity.
When draining a fuel tank or whenever a fuel line is disconnected, obstruct line with
a hose pincher or equivalent device.
Pay attention to the parts which using gasoline.
Pipes & cable must be in accordance with the location directed of wiring diagram.
Release air in motor oil pump when remove motor oil pipe.
Diagnosis of Trouble
No starting
No gasoline in tank
Gasoline blocked
Too much fuel in cylinder
Air filter is clogged
Idle speed unstable or carburetor
rotation not smooth
Poor idle speeds adjust of carburetor.
Low compression pressure
Poor ignition system
Bad adjustment of air adjusting screw
on carburetor
Air filter is clogged
Poor auto side-plunger on carburetor
Idle speed nozzle is clogged
Mixed air too rare
h Nozzle of carburetor is clogged
h Gasoline filter is clogged
h Vent of gasoline tank is clogged
h Gasoline pipe cranked, broke,
clogged
h Poor action of valve of float chamber
h Gasoline level too low
h Air pipe is clogged
Mixed air too rich
h Poor action of valve of float chamber
h Gasoline level too high
h Air nozzle is clogged
h Auto side-plunger poor
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