Honda Outboards BF40A/BF50A Service Manual, Page 252Get this manual
HONDA BF4DA-I5DA
Model Type Displacement Bore stroke Rated powerMaximum torque Compression ratio Fuel consumption ratio Cooling system Ignition system Ignition timing Spark plug Carburetor Lubrication system Lubrication capacity Starter system Stopping system Fuel Fuel tank capacity Fuel pump Exhaust system Recommended oil 1: Full throttle range528 B.T.D.C276 gkWh (203 gpsh, 0.45 Ibhph) BF40A
4-stroke, O.H.C 3-cylinder 808 cm (49.4 cu in) 70 70 mm (2.8 2.8 in)
40 PS (29.8 kW)at 5,0006,000 min-I (rpm) 6.05 kg-m (43.8 ft-Ib)at 3,500 min-I (rpm)
I 50 PS (36.8 kW)at 5,5006,000 min-I (rpm)
6.5 kg-m (47 .1 ft-Ib)at 4.500 min-I (rpm) 265 gkWh (195 gpsh, 0.43 Ibhph)
Forced water circulation by impeller pump with thermostat COl DR7EA (NGK), X22ESR-U (NIPPONDENSO) Horizontal type, butterfly valve (3 carburetor) Pressure lubrication by trochoid pump