Yamaha WaveRunner VX 700 Service Manual page 172

TRBL
SHTG
Engine unit troubleshooting
TIP:
• Before troubleshooting the engine unit, make sure that fresh fuel of the specified type has been
used.
• Check that all wiring connections are properly secured and that they are not rusty or corroded.
• Check that the engine shut-off cord is connected to the engine shut-off switch.
• Check that the battery is charged and that its specific gravity is within specification.
Troubleshooting (engine unit, jet pump unit, charging system)
Symptom 1: Specific trouble conditions
Symptom 2: Trouble conditions of an area or individual part
Cause: The content considered as the trouble factors for symptom 2
—: Not applicable
Symptom 1: Engine does not crank.
Symptom 2
Starter motor does
not operate
Starter motor oper-
ates, but the engine
does not crank
WD: See the wiring diagram.
9-1
Troubleshooting
Cause
Discharged battery
Loose connection of bat-
tery terminal
Blown fuse
Starter relay malfunction
Engine start switch mal-
function
Short, open, or loose con-
nection in starter motor cir-
cuit
Starter motor malfunction
Stuck piston or crankshaft
Stuck impeller
Starter clutch assy. or fly-
wheel magneto malfunc-
tion
Checking step
Check the battery voltage and spe-
cific gravity.
Check the battery cable and termi-
nal for proper connection.
Check the fuse for continuity
Check the starter relay.
Check the engine start switch.
(left handlebar switch)
Check the wiring harness.
Disassemble and check the starter
motor.
Disassemble and check the engine
unit.
Disassemble and check the jet
pump unit.
Check the starter clutch assy., fly-
wheel magneto, or Woodruff key.
See
page
3-8
7-2
7-10
7-11
7-10
WD
7-12
5-21
5-33
6-6
5-25
5-27