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Engine does not start (or, is difcult to start)
Engine cranks
There is fuel in the tank
Fuel is reaching carburetor
Fuel is reaching cylinder
There is spark at high
tension cord end
There is spark at plug
Starting procedures correct
Fuel is not reaching cylinder
No spark at high tension cord end
No spark at plug
Fuel does not
keep running
Acceleration and
low speed func-
tion defective
Carburetor
overow
Engine does not crank
Fuel strainer clogged
Fuel pipe clogged
Suction insufcient
Strainer clogged
Carburetor out of order
C.D.I. module defective
Ignition coil defective
Wire connection defective
High-tension cord connection defective
Switch is grounded
Insulator cracked
Starting procedures incorrect
Metering lever spring too strong
Retighten all screws.
Fuel mixture is too rich
Spark gap incorrect
Low and high speed needle setting too lean
Replace.
Readjust.
Bearing damaged
Covered with carbon
Fuel pump diaphragm defective
Clean.
Disassemble and check.
Replace or Clean.
Remove and replace.
Remove and replace.
Check impulse drilling.
Clean.
Reconnect.
Correct.
Repair as necessary.
Switch on.
Replace plug.
Adjust.
Clean or replace.
Clean or replace.
Start correctly.
Readjust.
Fuel inlet needle clogged with dust
Piston and/or cylinder deized
Mufer sticky with fuel
Disassemble and clean.
Fouled with fuel
Fuel passage clogged with dust
Fuel leaking from xing surfaces of carburetor
Air valve, fuel tank cap does not work normally
Fuel pump does not operate
Metering spring not placed in dent of lever
Crankshaft contacting crankcase
Clean.
Crankshaft worn
Clean.
Make sufcient.
Fuel is not reaching carbuerator
Disassemble and replace.
Disassemble and replace.
Disassemble and replace.
Disassemble and replace.
Table 1
tR o u b l e s h o o t i n g
Poor performance of the engine and/or cutting mechanism can normally be prevented by carefully following these
instructions.
Poor performance can easily be corrected even by a beginner.
When the engine does not function properly check the following three (3) points rst.
Is the 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 TROUBLESHOOTING refer to tables 1 and 2. Locate the problem on the following charts and repair as
necessary.