Motive Power Industry BLUR 150, Service Manual

Page: 16 / 234

(5)Trouble shooting:
1.difficult starting or can’t start:
Check and adjust Trouble condition The reason
check there is fuel or not
pipe between ful tank and
carburetor is blocked
Float is blocked
Fuel gauge is blocked
fuel pump is malfunctioned
spark plug out of order
dirty
CDI unit out of order
A.C. generator out of order
ignition coil disconnect or
short circuit
ignition coil disconnect or
short circuit
main switch out of order
defective magneto coil
starting clutch out of order
piston ring stuck
reed valve deteriorated
cylinder, piston, piston
ring worn out
cylinder gasket leakage
cylinder body has sand hole
bad action of auto choke
air trapped in intake manifold
wrong ignition timing
bad adjustment of carburetor’s
fuel adjusting screw
carburetor fuel level too high
malfunction of auto choke
throttle valve open too largely
Loose carburetor draining
Screw, check if in side of
Carburetor have fuel or not
The fuel supply in carburetors
Is enough or smooth No fuel supply in
carburetor
Remove spark plug, insert
Spark plug cover, and touch
With engine check there is
Any spark
There is sparking
In spark plug No sparking or
Weak sparking
Measurement of
Compression pressure
Pressure is
normal Insufficient or
No Pressure
Start engine: follow the
Instruction of starting
engine
Engine has no
knocking
Engine knocking
But can’t start
Remove spark plug
And check again
dry wet
12