Honda BF90D - Page 145

144
WARNING SYSTEM COMES ON
TROUBLESHOOTING
14.
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.
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.
REMEDY
Clean the cooling water intake port.
Consult with an authorized Honda
outboard motor dealer.
Add engine oil to the specified
level (see page 53).
Change the engine oil
(see page 120).
Replace the spark plugs (see page 122).