Yamaha 55B Owner's Manual page 122

EMK12011*
Item
DIMENSIONS
8Overall Length
8Overall Width
8Overall Height
L/X
8Tramsom Height L/X
8Weight
L/X
PERFORMANCE
8Full throttle operating range
8Maximum output
8Idling speed
ENGINE
8Type
Number of cylinders
Displacement
Bore × stroke
8Ignition system
8Spark plug
Spark plug gap
8Control system
8Starting system
8Battery capacity
8Alternator output
8Starting carburetion system
DRIVE UNIT
8Gear positions
Gear ratio
8Trim and tilt system
8Propeller mark
FUEL AND OIL
8Fuel
Fuel tank capacity
8Recommended engine oil
Oil tank capacity
Lubrication
8Fuel/oil ratio
8Recommended gearcase oil
Gear oil capacity
TIGHTENING TORQUE
8Spark plug
8Propeller nut
SPECIFICATION DATA
Model
Unit
mm (in.)
mm (in.)
mm (in.)
mm (in.)
kg (lb.)
r/min
kW
r/min
cm 3 (cu.in.)
mm (in.)
NGK
mm (in.)
V-Ah
V-Amp (W)
L (US gal, Imp gal)
L (US qt, Imp qt)
cm 3 (US oz, Imp oz)
N•m (kgf•m, lb•ft)
N•m (kgf•m, lb•ft)
4-3
85AET
726 (28.6)
374 (14.7)
1,422 (56.0) / —
521 (20.5) / —
121 (267) / —
4,500–5,500
62.5 at 5,000 r/min
750–850
2-stroke, L
3
1,140 (69.57)
82.0 × 72.0 (3.23 × 2.83)
C.D.I system
BR8HS-10
0.9–1.0 (0.035–0.039)
Remote control
Electric start
12-70–100
12-10
Choke valve start system
Forward-Neutral-Reverse
2.0 (26/13)
Power trim and tilt
K
Regular grade gasoline (petrol)
25 (6.60, 5.50)
YAMALUBE, TWO STROKE MOTOR OIL FOR MARINE
or an equivalent TC-W3 certified outboard oil
Remote : —
Engine : —
Premix
1 : 50
Hypoid gear oil (SAE 90)
610 (20.6, 21.5)
25 (2.5, 18)
35 (3.5, 25)
GB