Kawasaki FH541V KAI

Kawasaki FH541V KAIThe Kawasaki FH541V KAI is a 0.59 l (585 cc, 35.7 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.

The FH541V KAI engine is based on the FH541V motor, but it uses redesigned air cleaner and blower housings, new air filter options, internally vented carburetor, an advanced lubrication system design, and enhancements for optimal stability. The Japanese word “KAI” means evolution, advancement, and renewal.

The FH541V KAI has V-twin 90° design with vertical PTO shaft, cast-iron cylinder liners, and overhead V-valves. The engine is equipped with the electronic spark ignition system and internally-vented carburetor with fuel shut-off solenoid. The motor uses a 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 12V bendix starter available as an option). Solenoid fuel shut-off carburetor and alternator for electric clutch are also available as an option.

It has a 74.0 mm (2.91 in) cylinder bore and 68.0 mm (2.68 in) piston stroke. Compression ratio rating is 8.5:1. The Kawasaki FH541V KAI produced 17.3 PS (12.7 kW; 17.0 HP) at 3,600 rpm of maximum horsepower and 49.0 Nm (5.0 kg·m; 36.2 ft·lb) at 2,000 rpm of torque.

General information

Engine Specifications
ModelFH541V KAI
Type4-stroke, OHV, V-twin 90°
Displacement585 cm 3 (35.7 cu-in)
Max. horsepower17.3 PS (12.7 KW; 17.0 HP) at 3,600 rpm
Max. torque (crank PTO)49.0 Nm (5.0 kg·m; 36.2 ft·lb) at 2,000 rpm
CarburetorInternally-vented carburetor
Cooling systemAir-cooling
Ignition systemElectronic spark ignition
Lubricating systemFull pressure with spin-on oil filter
Starting systemRecoil or electric starter
Charging systemCharging coil with regulator
Fuel usedUnleaded gasoline (octane number 86 or higher)
Fuel consumption245 g/HPh
Cooling systemPressurized forced circulation type

Tightening torque specs

Tightening torque specs
Cylinder head25 Nm; 2.2 kg·m; 18.5 ft·lb
Connecting rod10 Nm; 1.0 kg·m; 7.4 ft·lb
Flywheel56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover25 Nm; 2.2 kg·m; 18.5 ft·lb
Intake manifold6 Nm; 0.6 kg·m; 4.4 ft·lb
Valve clearance lock nut7 Nm; 0.7 kg·m; 5.1 ft·lb

Maintenance data

Engine
Maximum speed3500 ± 100 rpm
Idle speed1500 ± 100 rpm
Cylinder compression4.0 kg/cm2 (56 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 (SF, SG, SH, or SJ )
Recommended oilSAE 10W-40, 10W-30, 5W-20
Oil capacity (with filter changed)1.5-1.7 litre
Ignition system
Spark plugNGK: BPMR6A
Spark plug gap0.75 mm (0.029 in)
Spark plug tightening torque22 Nm; 2.2 kg·m; 16.2 ft·lb
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