Troubleshooting - Honda BF40D Owner's Manual

15. TROUBLESHOOTING

WARNING SYSTEM COMES ON
SYMPTOM
Overheat warning system comes on:
• Overheat indicator comes on.
• Overheat warning buzzer sounds.
• Engine speed decreases and stops at last.
• Engine speed cannot be increased by opening the throttle.
• Engine will stop in 20 seconds after engine speed is limited.
Oil pressure warning system comes on:
• Oil pressure indicator does not come on.
• Oil pressure warning buzzer sounds.
• Engine speed decreases.
• Engine speed cannot be increased by opening the throttle.
PGM-FI warning system comes on:
• PGM-FI indicator comes on.
• PGM-FI warning buzzer sounds intermittently.
ACG warning system comes on:
• ACG indicator comes on.
• ACG warning buzzer sounds intermittently.
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POSSIBLE CAUSE
Cooling water intake port clogged.
Spark plugs have improper heat range. Replace the spark plugs (see page 114).
• Faulty water pump.
• Thermostat clogged.
• Faulty thermostat.
• Cooling water passage clogged.
• Exhaust gas invades cooling system.
Shortage of engine oil
Improper engine oil is used.
PGM-FI warning system is faulty.
Battery voltage is too high or low.
Faulty ACG.
REMEDY
Clean the cooling water intake port.
Consult with your outboard motor
dealer.
Add engine oil to the specified
level (see page 51).
Change the engine oil
(see page 112).
Consult with your outboard motor
dealer.
Check the battery (see page 116).
Consult with your outboard motor
dealer.