Table 2
Engine overheated
Improper fuel is used
Spark plug defective (burnt)
As cooling fins clogged, air does not pass well
Excessive deposits in combustion chamber
Use fuel with correct mixing ratio. Never use gasoline of poor quality.
Replace.
Clean fins.
Disassemble and remove carbon.
Engine keeps running,
Output (engine speed) sufficientOutput (engine speed) insufficient
Firing function defective 
Carburetor defective 
Other troubles
Spray is not a fine mist
No spray
Plug damaged or fouled
Combustion poor due to defective wiring
Carburetor overflow
Air filter clogged
Compression insufficient (piston ring stuck or worn out)
Cylinder chromium plating peeled or worn out
Exhaust port clogged with carbon
Throttle is not fully open
Pump case/blade worn out (Low pressure)
Chemical liquid line defective
(Mechanical seal or packing etc.)
Cracked spraying hose is used
Nozzle orifice is too large (Too much chemical is released)
Chemical line is completely clogged with dirt
Chemical tank is empty
Pump is damaged
Replace or clean.
Check wiring.
Refer to Table 1.
Clean as necessary.
Disassemble, check and replace if necessary.
Replace cylinder.
Clean as necessary.
Readjust.
Replace.
Replace.
Replace.
Replace.
Clean.
Refill.
Replace.
WARNING 
DANGER
FUEL VAPORS ARE EXTREMELY FLAMMABLE AND MAY CAUSE FIRE AND/OR EXPLOSION. NEVER TEST FOR IGNITION SPARK BY GROUNDING SPARK PLUG NEAR CYLINDER PLUG HOLE, OTHERWISE SERIOUS PERSONAL INJURY MAY RESULT.
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