Troubleshooting; Warning System Comes On - TOHATSU BFT 200D 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.
140
POSSIBLE CAUSE
Cooling water intake port clogged.
Spark plugs have improper heat range.
• 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.
https://www.boat-manuals.com/
REMEDY
Clean the cooling water intake port.
Replace the spark plugs (see page 118).
Consult with an authorized
TOHATSU outboard motor dealer.
Add engine oil to the specified level
(see page 58).
Change the engine oil
(see page 116).