LONCIN LC2P73F - Engine Underpower Diagnosis

Part IV Faults Diagnosis
- 19 -
4-2 Underpower of engine
(Use new fuel of designated quality)
(Clean)
(Refer to Section 3-7)
(Refer to Section 5-2-4)
(Open it to the maximum)
(Clean air filter)
(Adjust ignition time)
(Refer to Section 3-4)
(Refer to Section 5-2-9)
(Refer to Section 3-5)
(Clean)
(Refer to Section 5-2-6)
(Clean fuel filter)
Underpower
Fuel system
Ignition system
Compression
system
Fault or im
p
ro
p
er ad
j
ustment of carburetor
Fuel filter blocked
Choke valve not full
y
o
p
ened
Air filter dirt
y
S
p
ark
p
lu
g
defective
Wron
g
i
g
nition time
Excessive wear of c
y
linder/
p
iston/
p
iston rin
g
Im
p
ro
p
er valve clearance
Coolin
g
fan too dirt
y
Seal of valve seat not
g
ood
C
y
linder coolin
g
fin too dirt
y
Silencer blocked
Im
p
ro
p
er re
g
ulation of s
p
eed-re
g
ulatin
g
s
y
stem
Others
Poor fuel
q
ualit
y