Service manual

9-4
1
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9
A
Symptom 1: High engine idle speed
Symptom 1: Limited engine speed
Symptom 1: Discharged battery
Compression pres-
sure is low
Compression leakage Measure the compression pres-
sure.
3-5
Check the cylinder head gasket
and cylinder head warpage.
5-17
Check the piston and piston ring for
damage.
5-22
Check the cylinder for damage. 5-19
WD: See the wiring diagram.
Symptom 2 Cause Checking step
See
page
— Throttle cable installed
incorrectly
Adjust the throttle lever free play
and check the cable routing.
3-2
Improper throttle stop
screw setting
Adjust the throttle stop screw. 3-6
Symptom 2 Cause Checking step
See
page
• Buzzer sounds
intermittently
• Overheat warning
indicator blinks
•“WARNING” indi-
cator blinks
Clogged cooling water
passage
Check the cooling water pilot outlet
for water discharge.
—
Check the cooling water passage. 2-13
Thermoswitch malfunction Check the thermoswitch. 7-8
Symptom 2 Cause Checking step
See
page
— Battery performance
decrease
Check the battery voltage and spe-
cific gravity.
3-8
Loose connection of bat-
tery terminal
Check the battery cable and termi-
nal for proper connection.
7-2
Short, open, or loose con-
nection in charging circuit
Check the charging circuit for wir-
ing connection and damage.
WD
Lighting coil malfunction Measure the lighting coil output
peak voltage.
7-9
Measure the lighting coil resis-
tance.
7-9
Check the lighting coil wiring har-
ness leads for continuity.
WD
Rectifier regulator mal-
function
Measure the rectifier regulator out-
put peak voltage.
7-9
Check the rectifier regulator wiring
harness leads for continuity.
WD
WD: See the wiring diagram.
Symptom 2 Cause Checking step
See
page
Engine unit troubleshooting