Yamaha F30A Service Manual page 268

TRBL
SHTG
Symptom 2
Starter motor oper-
ates, but the engine
does not crank
Symptom 1: Engine does not start (engine cranks)
Symptom 2
Spark plug does not
spark
WD: See the wiring diagram.
9-3
Troubleshooting
Cause 1
Stuck piston
Piston lock due to
water in the com-
bustion chamber
Stuck drive shaft
Starter motor mal-
function
Damaged flywheel
magnet Woodruff
key
Cause 1
Spark plug malfunc-
tion
Spark plug cap mal-
function
Ignition coil mal-
function
Engine shut-off
switch malfunction
Charge coil mal-
function
Pulser coil malfunc-
tion
Short or open con-
nection in ignition
circuit
CDI unit malfunc-
tion
Cause 2
Seizure or rust
—
Buildup of foreign
material on the
drive shaft splines
and bushing
Malfunction of the
lower unit internal
parts
—
—
Cause 2
—
—
—
—
—
—
—
—
Checking step
Disassemble and
check the power
unit.
Disassemble and
check the lower
unit.
Disassemble and
check the starter
motor.
Check the flywheel
magnet Woodruff
key.
Checking step
Check the spark
plug.
Check the spark
plug cap.
Check the ignition
coil.
Check the engine
shut-off switch.
Check the charge
coil.
Check the pulser
coil.
Check the wiring
harness continuity.
Check the CDI unit.
Refer
to
page
5-1
6-13
8-9
5-22
Refer
to
page
3-6
8-16
8-16
8-18
8-19
8-17
8-17
WD
8-19
67C3K11