5-1
E
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.
Trouble
Possible Cause
Remedy
A. 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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