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Kawasaki FH451V Specifications
The Kawasaki FH451V is a 0.49 l (494 cc, 30.15 cubic inches) V-twin 90 deg air-cooled 4-stroke internal combustion small gasoline engine with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications. The FH451V has vertical PTO shaft; V-twin 90 deg design with cast iron cylinder liners and overhead valves (OHV). The engine is equipped with float type carburetor with a fixed main jet and pulse type fuel pump. The engine is equipped with an electronic spark ignition system; full pressure lubrication system with spin-on oil filter and dual element air cleaner. The engine has an automatic compression release (ACR) system with recoil or electric starter (12V solenoid shift starter or bendix starter are available as an option). It has a 68.0 mm (2.68 in) cylinder bore and 68.0 mm (2.68 in) piston stroke. Compression ratio rating is 8.5:1. The engine has a maximum power of 15.2 PS (11.2 kW; 15.0 HP) at 3,600 rpm of maximum horsepower and 34.6 Nm (3.5 kgm; 25.5 ft-lb) at 2,400 rpm of max torque.
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- Kawasaki FH451V Engine Specifications
- Kawasaki FH451V Engine Maintenance
- Kawasaki FH451V Engine Troubleshooting
| 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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| Engines Technical Specifications |