Trouble-Analysis Chart - Yamaha F15A Service Manual

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ANLS
TROUBLE-ANALYSIS
NOTE:
The following items should be checked before the "Trouble analysis" chart is consulted.
1.The battery is charged and its specified gravity is within specification.
2.There are no incorrect wiring connections.
3.Wiring connections are properly secured and are not rusty.
4.The lanyard is attached to the engine stop switch.
5.The shift position is in neutral.
6.Fuel is reaching the carburetor.
7.The rigging and engine settings are correct.
8.The engine is free from any "Hull problem".

TROUBLE-ANALYSIS CHART

Trouble mode
4 4 4
4 4
4 4
4
4 4
4 4 4
4 4 4
4 4 4
4 4 4 4
4 4
4 4 4 4
4 4 4
4
4
4 4 4
4 4 4
4 4
4 4
4 4
*Except for USA
TROUBLE-ANALYSIS
FUEL SYSTEM
Fuel hose
Fuel joint
Fuel filter
Fuel pump
Carburetor
4
4
Throttle cable
POWER UNIT
4
Spark plugs
Compression
Timing belt
Valve clearance
Intake and exhaust valves
Intake and exhaust valve seat
Cylinder head gasket
Piston rings
Piston
4
Thermostat
4
Water passage
Check elements
Relative part
8 Idle speed
8 Pilot screw*
8 Pilot jet
9-1
E
Reference
Chapter
4
4
4
4
4
3
*3
3
3
3
3
5
3
5
5
5
5
5
5
5