Yamaha WaveRunner VX 700 Service Manual page 175

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