Suzuki DF 50 Service Manual

ENGINE CONTROL SYSTEM 3-32
O
2
FEEDBACK SYSTEM
After extended usage, the engine components may become deteriorated or worn out.
This might make the A / F (air / fuel mixture ratio) incorrect which could affect exhaust emissions. To correct
the A/F, an O
2
sensor is temporally installed to the exhaust manifold. This sensor is used to measure the
concentration of oxygen in the exhaust gas at engine speeds of 2500, 3500 and 4500 r/ min.
The ECM uses the input data from the O
2
sensor to correct the compensation coefficient of the fuel injection
duration map within the ECM itself.
NOTE:
See the “FUEL MIXTURE CHECK (O
2
FEEDBACK)” section on page 2-21 for the O
2
feedback operation
procedure.
O
2
sensor :
Informs ECM of concentration of oxygen in exhaust gas.
ECM
Feedback

Suzuki DF 50 Specifications

General

Engine Type	4-Stroke
Cylinders	3
Displacement	941 cc
Starting System	Electric
Steering	Remote
Engine Type Detail	DOHC 12-Valve
Maximum Output	50 HP
Ignition System	Digital CDI
Alternator	12V 19A
Gear Ratio	2.27:1
Exhaust	Through Prop Hub Exhaust
Trim Method	Power Trim and Tilt
Max Power	50 HP
Alternator Output	12V 19A
Fuel Delivery System	Sequential Multi Point Electronic Fuel Injection
Full Throttle Operating Range	5, 300 - 6, 300 rpm
Engine Oil Capacity	2.7 L
Full Throttle RPM Range	5300 - 6300 RPM
Oil Capacity	2.7 L
Bore x Stroke	72.5 x 76.0 mm (2.85 x 2.99 in.)