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EMU01204¯
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
A. Starter will not
operate.
B. Engine will not
start (Starter
operates).
TROUBLESHOOTING
Possible Cause
1. Battery capacity weak or low.
2. Battery connections loose or
corroded.
3. Fuse for electric start circuit blown.
4. Starter components faulty.
5. Shift lever in gear.
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. Engine inner parts damaged.
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. Shift to neutral.
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. Have serviced by a Yamaha
dealer.
5-1
GB
Remedy
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