Suzuki DF 50 Service Manual

DF40QH / DF50QH 19
Engine speed control during shifting
On QH-specification models, a special safety feature to con-
trol engine speed during shifting has been added. This fea-
ture fixes the upper limit of engine speed during shifting to a
preset value of 1500 r/min.
[ Operation ]
If the CTP switch is “OFF” and engine speed at the moment of
shifting (neutral switch turns “OFF” ) is above the rpm limit of
1500 r/min, engine speed will automatically be lowered to
approximately 1500 r/min.
Once this feature is engaged, engine speed will be regulated
to remain at the fixed 1500 r/min limit until the feature is can-
celled.
[ Cancellation ]
The engine speed control feature will be canceled if any one
of the following conditions is satisfied:
• Throttle is returned to and remains at full close (CTP switch
“ON”) for at least one second.
• Engine speed is lowered below the control speed (1500 r/
min) and remains there for at least for two seconds.
Checking engine total operating hours
As a monitor-tachometer gauge is not supplied with QH mod-
els, engine total operating hours must be checked using SDS
and a personal computer or by temporarily connecting a DF
model monitor-tachometer.

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.)