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Outboard motor troubleshooting
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Troubleshooting the power unit (trouble code not detected)
Troubleshooting consists of the following 3 items:
Symptom 1: Specific trouble conditions
Symptom 2: Trouble conditions of an area or individual part
Cause: Trouble causes of symptom 2
— : Not applicable
Symptom 1: Engine does not crank.
Symptom 1: Engine will not start (engine cranks).
Symptom 2
Cause
Checking steps
See
page
Starter motor does not
operate
Gear shift not in the N position Set the gear shift to the N position.
Blown fuse
Check the fuse.
Starter relay malfunction
Check the starter relay.
Engine start switch malfunction Check the engine start switch.
Neutral switch malfunction
Check the neutral switch.
—
Short, open, or loose connec-
tion in starter motor circuit
Measure the starter relay input voltage.
Check the wiring harness for continuity.
Starter motor malfunction
Disassemble and check the starter
motor.
Starter motor operates,
but the engine does not
crank
Stuck piston or crankshaft
Disassemble and check the power unit.
Stuck drive shaft
Check the drive shaft bushing.
Disassemble and check the lower unit.
Symptom 2
Cause
Checking steps
See
page
Engine ECM does not
operate
Blown fuse
Check the fuse.
Main relay malfunction
Check the main relay.
Short, open, or loose connec-
tion in the engine ECM circuit
Check for wiring harness continuity
between the main relay and the engine
ECM.
Check for continuity between the engine
ECM and ground.
Spark plug does not pro-
duce a spark
(all cylinders)
Pulser coil malfunction
Measure the pulser coil output peak volt-
age.
Measure the pulser coil resistance.
Short, open, or loose connec-
tion in the pulser coil circuit
Check for wiring harness continuity
between the pulser coil and the engine
ECM.
Y-COP is locked.
Unlock Y-COP.
Summary of Contents for F150A
Page 1: ...SERVICE MANUAL 63P 28197 3P 12 F150A FL150A F150B FL150B ...
Page 4: ......
Page 48: ...2 3 Electronic control system Engine ECM component 2 3 4 6 5 1 8 7 10 9 11 12 14 15 16 13 17 ...
Page 110: ...3 41 Propeller selection MEMO ...
Page 129: ...4 18 Outboard motor troubleshooting MEMO ...
Page 175: ...5 44 PTT system 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 247: ...7 22 Starter motor Terminal nut 3 9 N m 0 9 kgf m 6 6 ft lb ...
Page 385: ...8 78 Shimming counter rotation model 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 449: ...9 62 PTT gear pump 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 474: ...i 8 Index 0 1 2 3 5 6 7 8 9 10 10 A MEMO ...
Page 475: ......
Page 476: ...Oct 2011 2 ABE E ...