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Home / Small Engines / Kawasaki Engines / Kawasaki FS481V

Kawasaki FS481V Specifications

Engine Model: Kawasaki FS481V

Engine Type: 4-cycle V-twin cylinder OHV gasoline engine

Total Displacement: 36.8 cu.in (603 cc)

Rated Engine Power: 13.5 Hp (10 kW)

Carburetor Type: Internally vented, fuel shut-off solenoid

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General Technical Data

Engine Model ............... Kawasaki FS481V
Engine Type ............... 4-cycle vertical shaft V-twin OHV air-cooled gasoline engine
Number of Cylinders ............... 2
Cylinder Liners ............... Cast iron
Displacement, cc (cu.in) ............... 603 (36.8)
Cylinder Bore, mm (in) ............... 73.0 (2.87)
Piston Stroke, mm (in) ............... 72.0 (2.84)
Rated Engine Power, hp (kW) ............... 13.5 (10.0)
Rated Engine Speed, rpm ............... 3600
Maximum Torque, Nm (ft-lb) ............... 38.4 (28.3)
Torque Speed, rpm ............... 1800
Compression Ratio ............... 8.1:1
Lubrication System ............... Pressure feed by positive displacement pump
Cooling System ............... Forced-air
Oil Filter Type ............... Cartridge, full flow
Ignition System ............... Electronic
Air Cleaner Type ............... Dual stage element
Starting System ............... Electric or recoil starter
Electrical System Rating, Volts ............... 12

Fuel System

Fuel System ............... Carburetor
Carburetor Type ............... Internally vented with fuel shut-off solenoid
Fuel Pump Type ............... Diaphragm pulse pump
Governor Type ............... Flyweight all speed governor
Fuel Type ............... Gasoline (86 or higher)

Dimensions and Weight

Overall Length, mm (in) ............... 484 (19.1)
Overall Width, mm (in) ............... 434 (17.2)
Overall Height, mm (in) ............... 377 (14.9)
Net weight, kg (lbs) ............... 36.7 (81.0)

Cylinder Block

Cylinder Inside Diameter (Max), mm (in) ............... 73.10 (2.878)
Cylinder Bore Out Round, mm (in) ............... 0.056 (0.0022)
Connecting Rod Small End Inside Diameter, mm (in) ............... 16.05 (0.632)
Connecting Rod Bend, mm (in) ............... 0.15/100 (0.006/3.94)
Connecting Rod Big End Width, mm (in) ............... 19.00 (0.748)
Crankpin Width, mm (in) ............... 40.0 (1.57)
Connecting Rod Big End Inside Diameter, mm (in) ............... 38.04 (1.50)
Crankpin Outside Diameter, mm (in) ............... 37.94 (1.49)
Crankshaft Runout, mm (in) ............... 0.05 (0.002)
Crankshaft Journal Diameter (PTO), mm (in) ............... 37.90 (1.492)
Crankshaft Journal Diameter (Flywheel), mm (in) ............... 34.90 (1.374)
Crankshaft Bearing Inside Diameter, mm (in) ............... 38.10 (1.500)

Cylinder Head and Valves

Cylinder Head Warp, mm (in) ............... 0.05 (0.002)
Valve Clearance (Intake, Exhaust), mm (in) ............... 0.10-0.15 (0.0040-0.0059)
Valve Seat Angle (Intake, Exhaust), deg ............... 45
Valve Seat Width (Intake), mm (in) ............... 0.8-1.4 (0.03-0.06)
Valve Seat Width (Exhaust), mm (in) ............... 0.8-1.4 (0.031-0.055)
Valve Guide Inside Diameter (Intake, Exhaust), mm (in) ............... 6.00-6.012 (0.2362-0.2367)
Valve Head Thickness (Intake, Exhaust), mm (in) ............... 0.35 (0.014)
Valve Stem Runout (Intake, Exhaust), mm (in) ............... 0.05 (0.002)
Valve Stem Diameter (Intake), mm (in) ............... 5.95 (0.234)
Valve Stem Diameter (Exhaust), mm (in) ............... 5.93 (0.233)
Valve Guide Inside Diameter (Intake, Exhaust), mm (in) ............... 6.08 (0.239)
Valve Spring Free Length (Intake, Exhaust), mm (in) ............... 31.0 (1.22)
Rocker Arm Push Rod Runout (Intake, Exhaust), mm (in) ............... 0.5 (0.02)
Cam Lobe Height, mm (in) ............... 29.621 (1.166)

Piston and Piston Rings

Piston Outside Diameter, mm (in) ............... 72.79 (2.866)
Top Ring Groove Clearance, mm (in) ............... 0.12 (0.0047)
Second Ring Groove Clearance, mm (in) ............... 0.12 (0.0047)
Piston Ring Thickness, mm (in) ............... 1.1 (0.043)
Top Ring End Gap, mm (in) ............... 0.7 (0.028)
Second Ring End Gap, mm (in) ............... 0.9 (0.035)
Oil Ring End Gap, mm (in) ............... 1.05 (0.041)
Piston Pin Outside Diameter, mm (in) ............... 15.96 (0.628)
Piston Pin Hole Inside Diameter, mm (in) ............... 16.08 (0.633)

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