LONCIN LC2P73F - Engine Speed Instability

Part IV Faults Diagnosis
- 20 -
4-3 Rotating speed instability of engine
(Refer to Section 3-7)
(Replace)
(Clean fuel filter)
(Use new fuel oil of specified quality)
(Refer to Section 5-2-4)
(Refer to Section 3-4)
(Refer to Section 5-2-5)
Rotational
speed
instability
Fuel system
Ignition system
Speed-regulating
system
Fuel is insufficient/of
p
oor
q
ualit
y
/
p
olluted
Fuel filter blocked
Carburetor blocked
S
p
ark
p
lu
g
blocked
Loosened i
g
nition circuit
Im
p
ro
p
er re
g
ulation of s
p
eed-re
g
ulatin
g
s
y
stem
D
y
sfunction of timin
g
g
ear