Lower Unit - TOHATSU BFT250A Service Manual

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ENGINE
Model
Description code
Type
Displacement
Bore x stroke
Rated power (*1)
Maximum torque
Compression ratio
Fuel consumption ratio
(at rated power)
Fuel consumption ratio
(at continuous maximum power)
Cooling system
Ignition system
Ignition timing
Spark plug Standard
Optional
Fuel supply system
Fuel injection system
Fuel injection nozzle
Fuel
Fuel pump
Lubrication system
Lubrication capacity
Starter system
Stopping system
Exhaust system
-1
*1: at 5,800 min (rpm)

LOWER UNIT

Clutch
Gear ratio
Reduction
Gear case oil capacity
Propeller rotating direction
4-stroke, O.H.C., 6-cylinder
3,583 cm
89.0 x 96.0 mm (3.50 x 3.78 in)
186.4 kW (250 PS)
320 N·m (32.6 kgf·m, 236 lbf·ft)
320 g/kW·h
320 g/kW·h
Forced water circulation by impeller pump with thermostat
Fully transistorized, battery ignition
0° at 650 min
ZFR6K-11E (NGK)
IZFR6K-11E (NGK)
Programmed fuel injection
Electronic control
Multi-point type
Unleaded gasoline with a pump octane rating of 86 or higher
Electric and mechanical plunger type
Pressure lubrication by trochoid pump
8.8 liters (9.3 US qt, 7.7 Imp qt)
[Without oil filter replacement: 7.6 liter (8.03 US qt, 6.69 Imp qt)]
[With oil filter replacement: 7.8 liter (8.24 US qt, 6.86 Imp qt)]
Electric starter
Primary circuit ground
Underwater type
Dog clutch (Forward – Neutral – Reverse)
2.00 (24/12)
Spiral bevel gear
1.47 liters (1.55 US qt, 1.29 Imp qt)
Clockwise (viewed from rear): LA, XA and XXA types
Counterclockwise (viewed from rear): XCA and XXCA types
GENERAL INFORMATION
BF250A
BEBJJ
3 (218.6 cu in)
10.0:1
-1 (rpm) B.T.D.C.
1-3