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Yamaha F40B - Page 268

Yamaha F40B
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TRBL
SHTG
Troubleshooting
9-3 67C3K11
Symptom 1: Engine does not start (engine cranks)
Starter motor oper-
ates, but the engine
does not crank
Stuck piston Seizure or rust Disassemble and
check the power
unit.
5-1
Piston lock due to
water in the com-
bustion chamber
—
Stuck drive shaft Buildup of foreign
material on the
drive shaft splines
and bushing
Disassemble and
check the lower
unit.
6-13
Malfunction of the
lower unit internal
parts
Starter motor mal-
function —
Disassemble and
check the starter
motor.
8-9
Damaged flywheel
magnet Woodruff
key
—
Check the flywheel
magnet Woodruff
key.
5-22
Symptom 2 Cause 1 Cause 2 Checking step
Refer
to
page
Spark plug does not
spark
Spark plug malfunc-
tion
—
Check the spark
plug.
3-6
Spark plug cap mal-
function
—
Check the spark
plug cap.
8-16
Ignition coil mal-
function
—
Check the ignition
coil.
8-16
Engine shut-off
switch malfunction
—
Check the engine
shut-off switch.
8-18
8-19
Charge coil mal-
function
—
Check the charge
coil.
8-17
Pulser coil malfunc-
tion
—
Check the pulser
coil.
8-17
Short or open con-
nection in ignition
circuit
—
Check the wiring
harness continuity.
WD
CDI unit malfunc-
tion
—
Check the CDI unit. 8-19
WD: See the wiring diagram.
Symptom 2 Cause 1 Cause 2 Checking step
Refer
to
page

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