Yamaha 25D - Maintenance; Specifications; Transporting and Storing Outboard Motor

33
Maintenance
EMU28216
Specifications
Dimension:
Overall length:
936 mm (36.9 in)
Overall width:
358 mm (14.1 in)
Overall height S:
1068 mm (42.0 in)
Transom height S:
419 mm (16.5 in)
Weight (AL) S:
48.0 kg (106 lb)
Performance:
Full throttle operating range:
5000–6000 r/min
Maximum output:
18.4 kW@5500 r/min (25 HP@5500
r/min)
Idling speed (in neutral):
750 ± 50 r/min
Engine:
Type:
2-stroke L
Displacement:
395.0 cm
3
(24.10 cu.in)
Bore × stroke:
67.0 × 56.0 mm (2.64 × 2.20 in)
Ignition system:
CDI
Spark plug (NGK):
B7HS-10
Spark plug with resistor (NGK):
BR7HS-10
Spark plug gap:
0.9–1.0 mm (0.035–0.039 in)
Control system:
Tiller
Starting system:
Manual
Starting carburetion system:
Choke valve
Alternator output:
80 W
Drive unit:
Gear positions:
Forward-neutral-reverse
Gear ratio:
2.08 (27/13)
Trim and tilt system:
Manual tilt
Propeller mark:
F
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. pump octane:
86
Recommended engine oil:
YAMALUBE 2-stroke outboard motor
oil
Fuel:oil ratio:
Regular gasoline:
100 :1
Lubrication:
Pre-mixed fuel and oil
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
370.0 cm
3
(12.51 US oz) (13.05
Imp.oz)
Tightening torque for engine:
Spark plug:
25.0 Nm (18.4 ft-lb) (2.55 kgf-m)
Propeller nut:
35.0 Nm (25.8 ft-lb) (3.57 kgf-m)
EMU28222
Transporting and storing
outboard motor
WARNING
EWM00690
● Leaking fuel is a fire hazard. When