LONCIN G120F - Page 20

G120F/G160F/G200F Part II Description of maintenance
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3. Troubleshooting with oil alert unit installed on the engine
Set the engine
switch in ON
position but
engine doesn’t
start.
Add oil to prescribed ※
volume before diagnosis
Remove the spark plug
and check with a new
spark plug.
No spark
● Fault of other part than oil alert unit
Good spark
Check for continuity
between oil level switch’s
yellow lead and ground
wire
Disconnect the engine
switch’s black wire (the
oil alert unit), and
recheck igniting state of
spark plug
●
Oil level switch faulty (lead or float
faulty)
● Replace oil level switch
● Engine switch (oil alert unit) faulty.
● Replace engine switch.
Set the engine switch
in OFF position but
engine doesn’t stop
(oil is adequate).
Disconnect
the
engine
switch’s black lead and
the ignition coil
’s black
lead
, ground the ignition
coil primary side
(the
disconnected black lead
)
and check igniting state
of spark plug.
● Engine switch (oil alert unit) faulty.
● Replace engine switch.
● Ignition coil’s primary side broken.
Engine doesn’t
stop when oil is
insufficient (oil alert
unit’s performance
is poor)
Check continuity between
oil level switch’s yellow
lead and ground wire
Continuity
No
continuity
● Oil level switch faulty (wire faulty)
● Replace oil level switch.
Disconnect the engine switch’s
black lead and the ignition coil’s
black lead, ground the ignition coil
primary side (the disconnected
black lead) and check igniting
state of spark plug.
Good spark
No spark
Good spark
No spark
Good spark
● Engine switch (oil alert unit) faulty.
● Replace engine switch.
●Ignition coil’s primary side broken.
※
Drain engine oil
before diagnosis
※
Add oil to prescribed
volume before diagnosis