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Troubleshooting – Yamaha F100A User Manual

Page 94

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5-1

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EMU01204¯

TROUBLESHOOTING

A problem in the fuel, compression, or ignition systems can cause poor starting, loss of
power, or other problems. The troubleshooting chart describes basic checks and possi-
ble remedies. (This chart covers all Yamaha outboard motors. Therefore, some items
may not apply to your model.)
If your outboard motor requires repair, bring it to a Yamaha dealer.

A. Starter will not

operate.

Trouble

Possible Cause

Remedy

1. Battery capacity weak or low.

2. Battery connections loose or

corroded.

3. Fuse for electric start circuit blown.

4. Starter components faulty.

5. Engine stop switch lanyard not

attached.

6. Shift lever in gear.

1. Check battery condition. Use

battery of recommended capacity.

2. Tighten battery cables and clean

battery terminals.

3. Check for cause of electric

overload and repair. Replace fuse

with one of correct amperage.

4. Have serviced by a Yamaha

dealer.

5. Attach lanyard.

6. Shift to neutral.

B. Engine will not

start (Starter

operates).

1. Fuel tank empty.

2. Fuel contaminated or stale.

3. Fuel filter clogged.

4. Starting procedure incorrect.

5. Fuel pump malfunctions.

6. Spark plug(s) fouled or incorrect

type.

7. Spark plug cap(s) fitted incorrectly.

8. Poor connections or damaged

ignition wiring.

9. Ignition parts faulty.

10. Engine stop switch lanyard not

attached.

11. Shift lever in gear.

12. Engine inner parts damaged.

1. Fill tank with clean, fresh fuel.

2. Fill tank with clean, fresh fuel.

3. Clean or replace filter.

4. Read "STARTING ENGINE"

section.

5. Have serviced by a Yamaha

dealer.

6. Inspect spark plug(s). Clean or

replace with recommended type.

7. Check and re-fit cap(s).

8. Check wires for wear or breaks.

Tighten all loose connections.

Replace worn or broken wires.

9. Have serviced by a Yamaha

dealer.

10. Attach lanyard.

11. Shift to neutral.

12. Have serviced by a Yamaha

dealer.

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