Kawasaki FB460V: 460 cc (12.5 HP) Vertical Shaft Engine Specs and Review

Kawasaki FB460V Engine Specs

The Kawasaki FB460V is a 0.46 l (28.1 cu-in,460 cc) air-cooled single-cylinder four-stroke internal combustion small gasoline (petrol) engine with a vertical shaft by Kawasaki Heavy Industries Ltd. for general-purpose use.

The FB460V engine has an L-shaped head with two valves, a transistorized flywheel magneto ignition system, a float-type carburetor with a fixed main jet, and a mechanical governor.

The engine had a pressurized lubrication system, a semi-cyclone air cleaner with two elements, and an electric or recoil starter. Model engines with an electric starter also have a 12V-13A charging coil with a regulator.

The piston stroke is 74.0 mm (2.91 in), and the piston bore is 89.0 mm (3.5 in). The compression ratio is 6.4:1. At 3,600 rpm, the Kawasaki FB460V motor produces 12.5 HP; at 2,300 rpm, it makes 28.0 Nm (2.8 kgm, 20.1 ftlb).

Kawasaki FB460V Engine Specs

Kawasaki FB460V: 460 cc (12.5 HP) Vertical Shaft Engine Specifications

Engine Specifications

Model FB460V
Type 4-stroke, L-head, single cylinder
Displacement 460 cm 3 (28.1 cu-in)
Max. horsepower 12.5 HP at 3,600 rpm
Max. torque 28.0 Nm (2.8 kg·m, 20.1 ft·lb) at 2,300 rpm
Carburetor Float type
Cooling system Forced-air
Ignition system Transistorized magneto ignition
Lubricating system Pressure and splash
Starting system Recoil or electric starter
Stoping system Ignition primary circuit ground
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel tank capacity
Fuel consumption 313 g/kWh (230 g/HPh, 0.51 lb/HPh)
PTO shaft rotation Counterclockwise (from PTO shaft side)

Maintenance Data

Maximum speed 3300 ± 150 rpm
Idle speed 1400 ± 150 rpm
Cylinder compression not be less then 3.0 kg/cm2 (43 psi) at 600 rpm
Valve tappet clearance (Cold)
Intake valve 0.10-0.16 mm (0.004-0.006 in)
Exhaust valve 0.10-0.16 mm (0.004-0.006 in)
Model FB460D-AS
Main jet #112.5
Pilot jet #47.5
Float valve 1.5 mm (0.06 in)
Pilot screw 1-1/8 turns out
Model FB460D-BS
Main jet #115
Pilot jet #47.5
Float valve 1.5 mm (0.06 in)
Pilot screw 1-1/8 turns out
Oil system
Oil type 4-stroke or an equivalent (SD, SE, SE/CC, SF)
Recommended oil SAE 5W-20
Oil capacity 1.4 L (2.96 US pt.)
Ignition system
Spark plug NGK: BMR-4A
Spark plug gap 0.6-0.7 mm (0.024-0.028 in)
Tightening torque 28 Nm; 2.8 kg·m; 20.6 ft·lb

Tightening torque specs

Connecting rod cap 19-20 Nm; 1.9-2.0 kg·m; 14-15 ft·lb
Cylinder head 34-39 Nm; 3.4-3.9 kg·m; 25-29 ft·lb
Flywheel nut 83-88 Nm; 8.3-8.8 kg·m; 62-65 ft·lb
Spark plug 28 Nm; 2.8 kg·m; 20.6 ft·lb

Dimensions and Weight

  Electric starter Recoil starter
Length 419 mm (16.50 in) 511 mm (20.12 in)
Width 381 mm (15.0 in) 365 mm (14.37 in)
Height 307 mm (12.08 in) 356 mm (14.0 in)
Dry weight 36.0 kg (79.4 lbs) 36.0 kg (79.4 lbs)

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Final Words

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