１.No fuel in fuel tank
２ .Air existed in the fuel supply
system
３ . Electron magnetic stop valve
does not work
４.Unqualified fuel
５.Dirty air filter
６.Low environmental temperature
７.Fuel filter is blocked
８.Incorrect fuel supply timing
９.Blocked nozzle
10. Incorrect air intake and outlet
valve clearance
11. Poor inside compress of Cylinder
（1）Leakage of air valve
（2）Cylinder, piston, piston rings are
worn out
12.Starting fuel supply is not enough
for fuel pump
Add fuel
Eliminate air
Check the function of electron magnetic stop valve
with electricity, then repair or replace
Replace fuel with correct specification
Replace air filter element
Use air heater
Replace fuel filter element
Check and adjust fuel supply advanced angle
Check or replace nozzle
Check and adjust valve clearance
Check the cylinder inside compress pressure standard
value 3.1Mpa, with lowest value 2.2Mpa
Check or skive air valve
Repair by professional technician
Check and adjust the fuel pump on the test table
1. Battery without enough electricity
or loosen connector
2. Starter does not work properly,
only run idle
3. Hard meshing for starter
4.Low running speed of starter
Check the wiring connector or the electrolyte level and
proportion in the battery and recharge the battery
Adjust the joggle position between starter and flywheel
gear ring surface
Battery pressure is heavy in winter or the battery cable
is slightness
Low air intake
pressure indicator
lamp
Clean the filter element through
compressive air or replace
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