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Home / Small Engines / Kawasaki Engines / Kawasaki FH451V

Kawasaki FH451V Specifications

Engine Model: Kawasaki FH451V

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

Total Displacement: 30.1 cu.in (494 cc)

Rated Engine Power: 15 Hp (11.2 kW)

Carburetor Type: Float, fixed main jet

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General Technical Data

Engine Model ............... Kawasaki FH451V
Engine Type ............... 4-cycle vertical shaft OHV air cooled gasoline engine
Number of Cylinder ............... 2
Cylinder Layout ............... 90 deg, V-Twin
Displacement, cc (cu.in) ............... 494 (30.1)
Cylinder Bore, mm (in) ............... 68.0 (2.68)
Piston Stroke, mm (in) ............... 68.0 (2.68)
Engine Power, Hp (kW) ............... 15.0 (11.2)
Maximum Torque, Nm (ft-lb) ............... 34.6 (25.5)
Torque Speed, rpm ............... 2400
Compression Ratio ............... 8.5:1
Compression Release ............... Automatic
Direction of Rotation ............... Counterclockwise (PTO Shaft)
Lubricating System Type ............... Pressure feed by positive displacement pump
Oil Filter Type ............... Cartridge type full flow filter
Air Cleaner Type ............... Dual stage element, dry type
Cooling System ............... Forced air cooled
Ignition System ............... Flywheel magneto transistor type
Choke Control ............... Automatic with throttle control
Starting System ............... Bendix type electric starter
Electrical System Rating, Volts ............... 12

Fuel System

Fuel System ............... Carburetor
Carburetor Type ............... Float with fixed main jet
Fuel Pump Type ............... Diaphragm type pulse pump
Governor Type ............... Flyweight all speed governor
Fuel Type ............... Gasoline (86 or higher)

Dimensions and Weight

Overall Length, mm (in) ............... 425 (16.7)
Overall Width, mm (in) ............... 359 (14.1)
Overall Height, mm (in) ............... 361 (14.2)
Dry weight, kg (lbs) ............... 33.0 (72)

Cylinder Block

Cylinder Inside Diameter (Max), mm (in) ............... 68.10 (2.681)
Cylinder Bore Diameter (Std), mm (in) ............... 68.00-67.98 (2.677-2.676)
Cylinder Bore Diameter (0.50 Oversize), mm (in) ............... 68.50-68.48 (2.697-2.696)
Cylinder Bore Out Round, mm (in) ............... 0.056 (0.0022)
Crankpin Width, mm (in) ............... 39.50 (1.56)
Crankpin Outside Diameter, mm (in) ............... 34.94 (1.3756)
Crankshaft Run Out, mm (in) ............... 0.05 (0.002)
Crankshaft Journal Diameter (PTO), mm (in) ............... 34.90 (1.374)
Crankshaft Journal Diameter (Flywheel), mm (in) ............... 34.93 (1.375)
Crankshaft Journal Bearing Inside Diameter, mm (in) ............... 35.15 (1.384)
Connecting Rod Bend, mm (in) ............... 0.15/100 (0.006/3.94)
Connecting Rod Big End Width, mm (in) ............... 18.80 (0.74)
Connecting Rod Big End Inside Diameter, mm (in) ............... 35.055 (1.3801)
Connecting Rod Small End Inside Diameter, mm (in) ............... 16.05 (0.632)
Camshaft Journal Diameter, mm (in) ............... 15.985 (0.6293)
Camshaft Bearing Inside Diameter, mm (in) ............... 16.136 (0.6352)

Cylinder Head and Valves

Cylinder Head Warp, mm (in) ............... 0.05 (0.002)
Valve Clearance, mm (in) ............... 0.10-0.15 (0.004-0.006)
Valve Seating Surface Angle, deg ............... 45
Valve Seating Surface Width, mm (in) ............... 0.6-0.9 (0.024-0.035)
Valve Guide Inside Diameter, mm (in) ............... 6.00-6.012 (0.2362-0.2367)
Valve Head Thickness, mm (in) ............... 0.35 (0.014)
Valve Stem Runout, mm (in) ............... 0.05 (0.002)
Valve Stem Diameter (Intake), mm (in) ............... 5.95 (0.0234)
Valve Stem Diameter (Exhaust), mm (in) ............... 5.93 (0.0233)
Valve Guide Inside Diameter, mm (in) ............... 6.08 (0.239)
Valve Spring Free Length, mm (in) ............... 31.0 (1.22)
Rocker Arm Push Rod Run Out, mm (in) ............... 0.5 (0.02)
Cam Lobe Height, mm (in) ............... 29.131 (1.1469)

Piston and Piston Rings

Piston Diameter, mm (in) ............... 67.79 (2.669)
Piston Pin Outside Diameter, mm (in) ............... 15.96 (0.628)
Piston Pin Hole Inside Diameter, mm (in) ............... 16.08 (0.633)
Top Ring Groove Clearance, mm (in) ............... 0.15 (0.006)
Second Ring Groove Clearance, mm (in) ............... 0.12 (0.005)
Piston Ring Width, mm (in) ............... 1.40 (0.055)
Top Ring End Gap, mm (in) ............... 0.70 (0.028)
Second Ring End Gap, mm (in) ............... 0.78 (0.031)
Oil Ring End Gap, mm (in) ............... 1.05 (0.041)

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