Engine
Trouble
Not started.
Not turned or
slow turning.
Normal turning,
but not started.
Engine starts but stops immediately. Engine oil shortage.
Rotation is irregular.
Engine suddenly stops.
Insufficient output.
When loaded, rotation goes slow.
Coolant leaks out.
Exhaust gas is bad.
Abnormal sound
Large vibration.
If you have any questions, contact a Yamaha dealer.
Cause
Battery trouble.
Insufficient battery charge.
Slow turning at cold circumstance due
to high viscosity of engine oil.
Fuse blown out (Slow blow fuse)
Terminal cover open.
Fuel shortage.
Fuel does not flow.
Air and water are contained in fuel
supply line.
Injection pipe is loosened.
Fuel shortage.
Fuel does not flow.
Air and water are contained in the fuel
supply line.
Injection pipe is loosened.
Fuel shortage.
Insufficient engine oil.
Water temperature is too high.
• Insufficient cooling water.
• Loosened water pump belt.
• Blockage of radiator.
Terminal cover open.
Choke of air cleaner element.
Choke of fuel system.
Choke of fuel filter.
Oil deterioration.
Overload.
Insufficient cooling water.
Loosened fan belt.
Blockage of radiator.
Choke of air cleaner element.
Engine oil is over filled.
Fuel quality is bad.
Crack of vibration-proof rubber.
Others.
TROUBLESHOOTING
Countermeasure
• Replacement of battery.
• Recharge battery.
• Replace engine oil to D5W40 or
D10W30 for cold.
• Replace fuse.
• Close terminal cover. Fix terminal
cover with panel lock bolts.
• Refuel.
• Check fuel filter. If filter is dirty, replace.
• Check fuel tank. Remove the settled
impurities or moisture.
• Check pipe and fastening clamp. If
any damage exists, replace or repair.
• Relieve air.
• Remove water inside of fuel tank and
filter.
• Re-tighten.
• Add engine oil to upper limit of gauge.
• Refuel.
• Check fuel filter. If filter is dirty, replace.
• Check fuel tank. Remove the settled
impurities or moisture.
• Check pipe and fastening clamp. If any
damage exists, replace it, or repair.
• Relieve air.
• Remove water inside of fuel tank and
filter.
• Re-tighten.
• Refuel.
• Fill oil.
• Fill cooling water.
• Adjust belt tension.
• Clean.
• Close terminal cover. Fix terminal
cover with panel lock bolts.
• Replace air cleaner element.
• Check.
• Element cleaning.
• Replace engine oil.
• Refer to generator.
• Fill cooling water.
• Adjust belt tension.
• Clean.
• Clean air cleaner element.
• Remove oil to upper limit of gauge.
• Replace fuel with good quality fuel.
• Replace.
• Check, repair.
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