Honda BF90D User Manual

154
15. TROUBLESHOOTING
WARNING SYSTEM COMES ON
SYMPTOM POSSIBLE CAUSE REMEDY
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.
Cooling water intake port clogged. Clean the cooling water intake port.
Spark plugs have improper heat range. Replace the spark plugs
(see pages 130 – 133).
• Faulty water pump.
• Thermostat clogged.
• Faulty thermostat.
• Cooling water passage clogged.
• Exhaust gas invades cooling system.
Consult with an authorized
Honda outboard motor dealer.
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.
Shortage of engine oil Add engine oil to the specified
level (see page 59).
Improper engine oil is used. Change the engine oil
(see page 128).
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Honda BF90D Specifications

General

Bore & Stroke	73 mm x 89.4 mm
Horsepower	90 HP
Cooling System	Water Cooled
Starting System	Electric
Gear Ratio	2.33:1
Trim Range	-4° to +16°
Tilt Range	70°
Dry Weight	163 kg (359 lbs)
Lubrication	Wet Sump
Recommended Fuel	Unleaded Gasoline (86 Octane or higher)
Gear Shift	F-N-R
Steering	Remote
Trim Method	Power Trim and Tilt
Displacement	1496 cc
Exhaust	Through propeller
Alternator Output	44 Amps
Recommended Engine Oil	10W-30 FC-W
Shaft Length	20" or 25"
Engine Type	4-Stroke SOHC, 4 Cylinders
Fuel Delivery	Programmed Fuel Injection