- 12 -
Improper fuel is used
Use fuel with correct mixing
ratio. Never use gasoline of
poor quality.
Spark plug defective (burnt)
Replace.
As cooling fins clogged, air
Clean fins.
does not pass well
Excessive deposits in
Disassemble and remove
combustion chamber
carbon.
Plug damaged or fouled
Replace or clean.
Combustion poor due to
Check wiring.
defective wiring
Carburetor overflow
Refer to Table 1.
Air filter clogged
Clean as necessary.
Compression insufficient
Disassemble, check and
(piston ring stuck or worn
replace if necessary.
out)
Cylinder chromium plating
Replace cylinder.
peeled or worn out
Exhaust port clogged with
Clean as necessary.
carbon
Throttle is not fully open
Readjust.
Pump case/blade worn out
Replace.
(Low pressure)
Chemical liquid line
Replace.
defective
(Mechanical seal or packing
etc.)
Cracked spraying hose is
Replace.
used
Nozzle orifice is too large
Replace.
(Too much chemical is
released)
Chemical line is completely
Clean.
clogged with dirt
Chemical tank is empty
Refill.
Pump is damaged
Replace.
Firing function defective
Engine overheated
Output (engine speed) insufficient
Table 2
Engine keeps running,
Carburetor defective
Other troubles
Spray is not a fine mist
No spray
Output (engine speed) sufficient
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.
