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Fuel strainer clogged Clean.
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 diaphram 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
TROUBLE SHOOTING
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
Fuei 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
Poor performance of the engine and/or trimming mechanism can normally be prevented by carefully following
instructions.
Poor performances can easily be corrected even by a beginner.
When the engine does not function properly check the following three (3) points first.
• Is engine compression adequate?
• Is fuel system in good condition and is enough fuel being supplied?
• Is electrical system in good condition and is spark plug operating normally?
When there is serious trouble with the unit, do not try to repair it yourself but have your distributor or dealer do it
for you. For detailed TROUBLE SHOOTING refer to tables 1 and 2. Locate the problem on the following charts
and repair as necessary.
Engine cranks
Engine does not start (or, is difficult to start)
There is fuel in the tank
Fuel is reaching carburetor