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Fuel strainer clogged Clean or replace.
Fuel pipe clogged Clean.
Suction insufficient Make sufficient.
Strainer clogged Clean.
Carburetor out of order Disassemble and check.
C.D.I. module defective Remove and replace.
Ignition coil defective Remove and replace.
Wire connection defective Reconnect.
High-tension cord connection Repair as necessary.
defective
Switch is grounded Switch on.
Insulator cracked Replace plug.
Spark gap incorrect Adjust.
Covered with carbon Clean or replace.
Fouled with fuel Clean or replace.
Starting procedures incorrect Start correctly.
Low and high speed needle Readjust.
setting too lean
Metering lever spring too strong Readjust.
Fuel pump diaphragm defective Replace.
Fuel passage clogged with dust Disassemble and clean.
Fuel leaking from fixing Retighten all screws.
surfaces of carburetor
Air valve, fuel tank cap Replace or clean.
does not work normally
Fuel pump does not operate Check impulse drilling.
Fuel inlet needle valve Clean.
clogged with dust
Metering lever spring not placed Correct.
in dent of lever
This is because fuel
mixture is too rich.
Muffler sticky Start the engine several
with fuel times with choke shutter
fully open and run at fast
idle until engine does not
smoke.
Bearing damaged Disassemble and replace.
Piston and/or cylinder seized Disassemble and replace.
Crankshaft worn Disassemble and replace.
Crankshaft contacting Disassemble and replace.
crankcase
Fuel is not
reaching
carburetor
Starting procedures
correct
Accelera-
tion and
low speed
function
defective
No spark at high
tension cord end
No spark at plug
Fuel is not
reaching
cylinder
Fuel is reaching cylinder
There is spark at plug
There is spark at high
tension cord end
Fuel does
not keep
running
Carburetor
overflow
Engine does
not crank
Table 1
Engine cranks
Engine does not start (or, is difficult to start)
There is fuel in the tank
Fuel is reaching carburetor