4-2
dummyhead
dummyhead
TROUBLESHOOTING
TROUBLESHOOTING
BEFORE TROUBLESHOOTING
• Use a known-good battery for troubleshooting.
• Check that the connectors are connected securely.
• Check for sufficient fresh fuel in the fuel tank.
• Read the circuit tester's operation instructions carefully, and observe the instructions during inspection.
• Disconnect the battery cable before continuity inspection.
TROUBLESHOOTING
HARD STARTING
• Check the engine oil level before troubleshooting.
Cranks
Does not crank
Wet
Spark
No spark
Dry
Flows
Does not flow
Normal
With starter motor:
Turn the combination switch to the START
position and check whether the engine
cranks.
Perform the spark test (page 9-5).
Check the spark plug (page 3-9).
Loosen the carburetor drain screw, and
check the fuel flow from the fuel tank.
If spark plug is correct, clean and dry the
electrodes, and then restart the engine,
taking care that the choke valve is not closed
too much.
If the engine does not start and the electrode
are wet again, check the carburetor float
valve (page 6-16).
Perform the IGNITION SYSTEM
TROUBLESHOOTING (page 9-3).
Perform the STARTING SYSTEM
TROUBLESHOOTING (page 10-2).
Disassemble the carburetor to clean the
carburetor ports, jets, and nozzles (page 6-
15).
Check for clogged fuel filter, fuel tube, and
fuel strainer screen (page 6-3).
Go to page 4-3
Without starter motor:
Pull the recoil starter and check whether the
engine cranks.
Cranks
Cannot be cranked
Check the recoil starter (page 10-8).
- If the recoil starter operates correctly when
removed but is hard to pull when installed on
the engine, check the decompressor
operation of the camshaft (page 14-20).
- If the recoil starter operates correctly when
removed but cannot be pulled when installed
on the engine, disassemble the engine and
repair or replace the faulty part(s) (page 14-6).
62Z7B000.book 2 ページ 2012年9月27日 木曜日 午前10時21分
Summary of Contents for GX270H
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