Yamaha Waverunner VXS VX1800 Service Manual page 311

Symptom 1: Discharged battery
Symptom 2
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Symptom 1: Poor performance
Symptom 2
Watercraft cannot
reach high speeds
Cause
Battery performance de-
crease
Loose connection of bat-
tery terminal
Short, open, or loose con-
nection in charging circuit
Stator coil malfunction
Rectifier/regulator malfunc-
tion
Cause
Jet pump unit malfunction
Water entered hull
Checking step
Check the battery voltage and spe-
cific gravity.
Check the battery lead and terminal
for proper connection.
Check the charging circuit for wiring
connection and damage.
Check the stator coil
Measure the rectifier/regulator out-
put peak voltage.
Checking step
Check the impeller, impeller duct,
and intake grate.
Check the drain plugs and O-rings
for damage.
Check the cooling water hoses for
damage.
Check the water lock, water tank,
and rubber hoses for damage.
Check the exterior of the hull for
damage.
9-20
Engine unit troubleshooting
See
page
3-6
3-6
A-2
7-13
7-13
See
page
3-10
6-1
6-10
8-31
1-33
8-22
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