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28. Troubleshooting
1. Difficulties during commissioning
Situation
Spark plug
No ignition
spark
Other
Compression
Weak ignition
spark
The carburetor does not
pump oil anymore.
Regular oil supply but
weak compression
Regular oil supply and
good ignition spark
2. Difficulties during operation
Situation
Cause
Choke is in "COLD START" position, the exhaust
system is blocked, no air supply, moving elements
The engine does not
worn, ignition spark weak too large valve clearance,
reach the speed
cylinder head sooty
Operating materials
Lines to carburetor blocked Spark plug spacing
are leaking
incorrect
Engine
Wrong choke position,
Noises
Camshaft damaged
Failure of the check valve on the tank cap
Carburetor leaking
The carburetor gasket is worn out
Manual_FX-WP143_FX-WP152_Int24_rev11
Cause
Carbon deposit between the diodes of the
spark plug
Ignition coil defective flywheel magnet too
weak
Too much gasoline in the combustion
chamber, bad fuel or water in the tank
Oil line blocked
Piston rings worn, spark plug not screwed
down, cylinder head not tight wrong valve
clearance or ignition timing.
Poor contact between ignition cap and
spark plug
43
Solution
Clean the spark plug. Adjust
the gap 0.6~0.7mm, replace
the spark plug
Replace the ignition coil or
flywheel
Remove the spark plug and
allow to dry, replace fuel.
Cleaning the carburetor
and cleaning the pipes
Replace screw tight replace
or adjust
Replace or check
Solution
Open choke, replace exhaust system Check or
replace ignition coil, adjust flywheel, spark
plug
Replace lines and carburetor Adjust gap
dimension
Check/replace camshaft
Replace the fuel filler cap
Replace carburetor or gasket
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