Kawasaki FR541V

Kawasaki FR541VThe Kawasaki FR541V is a 0.6 l (603 cc, 36.8 cu-in) V-twin 90° air-cooled 4-stroke internal combustion small gasoline engine with vertical shaft, manufactured by Kawasaki Heavy Industries LTd., for general-purpose applications, such as residential zero-turn mowers, lawn and garden tractors.

The FR541V has 90 degrees V-twin design with vertical PTO shaft, overhead valves, cast iron cylinder liners, and spherical combustion chamber. The engine is equipped with the electronic spark ignition system and internally vented carburetor with fuel shut-off solenoid. The motor uses a high-performance lubrication system and single-stage air filter.

The engine has an automatic compression release (ACR) system with bendix type starter. 13A or 20A charge coils are available as an option.

A 73.0 mm (2.87 in) cylinder bore and 72.0 mm (2.83 in) piston stroke give the motor a total of 603 cc, 36.8 cu-in of displacement. Compression ratio rating is 8.1:1. The Kawasaki FR541V produced 15.3 PS (11.3 kW; 15.1 HP) at 3,600 rpm or 15.2 PS (11.2 kW; 15.0 HP) at 3,600 rpm of maximum horsepower and 39.1 Nm (4.0 kg·m; 28.9 ft·lb) at 2,200 rpm or 43.0 Nm (4.39 kg·m; 31.73 ft·lb) at 2,000 rpm of torque.

General information

Engine Specifications
ModelFR541V
Type4-stroke, OHV, V-twin 90°
Displacement603 cm 3 (36.8 cu-in)
Max. horsepower 17.3 PS (12.7 KW; 17.0 HP) at 3,600 rpm
15.2 PS (11.2 KW; 15.0 HP) at 3,600 rpm
Max. torque (crank PTO) 39.1 Nm (4.0 kg·m; 28.9 ft·lb) at 2,200 rpm
43.0 Nm (4.4 kg·m; 31.7 ft·lb) at 2,000 rpm
CarburetorInternally vented with fuel shut-off solenoid
Cooling systemAir-cooling
Ignition systemElectronic spark ignition
Lubricating systemFull pressure with spin-on oil filter
Starting systemBendix type starter
Charging system13A or 20A charge coil (option)
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel consumption245 g/HPh
Cooling systemPressurized forced circulation type

Dimensions and Weight

Kawasaki FR541V
Length, mm (in)482 (19.0)
Width, mm (in)429 (16.9)
Height, mm (in)370 (14.6)
Dry weight, kg (lb)36.7 (80.9)

Tightening torque specs

Tightening torque specs
Cylinder head27.5 Nm; 2.75 kg·m; 20.3 ft·lb
Connecting rod10 Nm; 1.0 kg·m; 7.4 ft·lb
Flywheel56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover27.5 Nm; 2.75 kg·m; 20.3 ft·lb
Intake manifold9 Nm; 0.9 kg·m; 6.6 ft·lb
Valve clearance lock nut11 Nm; 1.1 kg·m; 8.1 ft·lb

Maintenance data

Engine
Maximum speed3500 ± 100 rpm
Idle speed1500 ± 100 rpm
Cylinder compression4.5 kg/cm2 (64 psi) at 500 rpm
Valve clearance
Intake valve0.10-0.15 mm (0.004-0.006 in)
Exhaust valve0.10-0.15 mm (0.004-0.006 in)
Oil system
Oil type4-stroke or an equivalent (SJ or higher class)
Recommended oilSAE 10W-40, 10W-30
Oil capacity (with filter changed) With oil filter: 2.1 litre
Withuot oil filter: 1.8 litre
Ignition system
Spark plugNGK: BPR4ES
Spark plug gap0.7-0.8 mm (0.027-0.031 in)
Ignition coil air gap0.2-0.4 mm (0.008-0.011 in)
Spark plug tightening torque22 Nm; 2.2 kg·m; 16.2 ft·lb
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