E

 

 

 

 

 

 

 

Trouble

 

Possible Cause

 

Remedy

 

 

 

 

 

 

 

 

 

 

1.

Spark plug(s) fouled or incorrect

1.

Inspect spark plug(s). Clean or

 

 

 

 

type.

 

replace with recommended type.

 

 

 

2.

Fuel system obstructed.

2.

Check for pinched or kinked fuel

 

 

 

 

 

 

line or other obstructions in fuel

 

 

 

 

 

 

system.

 

 

 

3.

Fuel contaminated or stale.

3.

Fill tank with clean, fresh fuel.

 

 

 

4.

Fuel filter clogged.

4.

Clean or replace filter.

 

 

 

5.

Failed ignition parts.

5.

Have serviced by a Yamaha

 

 

 

 

 

 

dealer.

 

 

 

6.

Warning system activated.

6.

Find and correct cause of warning.

 

 

 

7.

Spark plug gap incorrect.

7.

Inspect and adjust as specified.

 

 

 

8.

Poor connections or damaged

8.

Check wires for wear or breaks.

 

 

 

 

ignition wiring.

 

Tighten all loose connections.

 

 

 

 

 

 

Replace worn or broken wires.

 

 

 

9.

Specified engine oil not used.

9.

Check and replace oil as specified.

C. Engine idles

10.

Thermostat faulty or clogged.

10.

Have serviced by a Yamaha

irregularly or stalls.

 

 

 

dealer.

 

 

 

11.

Carburetor adjustments incorrect.

11.

Have serviced by a Yamaha

 

 

 

 

 

 

dealer.

 

 

 

12.

Fuel pump damaged.

12.

Have serviced by a Yamaha

 

 

 

 

 

 

dealer.

 

 

 

13.

Air vent screw on the fuel tank

13.

Open the air vent screw.

 

 

 

 

closed.

 

 

 

 

 

14.

Choke knob pulled out.

14.

Return to home position.

 

 

 

15.

Motor angle too high.

15.

Return to normal operating

 

 

 

 

 

 

position.

 

 

 

16.

Carburetor clogged.

16.

Have serviced by a Yamaha

 

 

 

 

 

 

dealer.

 

 

 

17.

Fuel joint connection incorrect.

17.

Connect correctly.

 

 

 

18.

Throttle valve adjustment incorrect.

18.

Have serviced by a Yamaha

 

 

 

 

 

 

dealer.

 

 

 

19.

Battery lead disconnected.

19.

Connect securely.

 

 

 

 

 

 

 

5-2