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
Model FH541V KAI
Type 4-stroke, OHV, V-twin 90°
Displacement 585 cm 3 (35.7 cu-in)
Max. horsepower 17.3 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
Carburetor Internally-vented carburetor
Cooling system Air-cooling
Ignition system Electronic spark ignition
Lubricating system Full pressure with spin-on oil filter
Starting system Recoil or electric starter
Charging system Charging coil with regulator
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel consumption 245 g/HPh
Cooling system Pressurized forced circulation type

Tightening torque specs

Tightening torque specs
Cylinder head 25 Nm; 2.2 kg·m; 18.5 ft·lb
Connecting rod 10 Nm; 1.0 kg·m; 7.4 ft·lb
Flywheel 56 Nm; 5.7 kg·m; 41.3 ft·lb
Crankcase cover 25 Nm; 2.2 kg·m; 18.5 ft·lb
Intake manifold 6 Nm; 0.6 kg·m; 4.4 ft·lb
Valve clearance lock nut 7 Nm; 0.7 kg·m; 5.1 ft·lb

Maintenance data

Engine
Maximum speed 3500 ± 100 rpm
Idle speed 1500 ± 100 rpm
Cylinder compression 4.0 kg/cm2 (56 psi) at 500 rpm
Valve clearance
Intake valve 0.10-0.15 mm (0.004-0.006 in)
Exhaust valve 0.10-0.15 mm (0.004-0.006 in)
Oil system
Oil type 4-stroke or an equivalent (SF, SG, SH, or SJ )
Recommended oil SAE 10W-40, 10W-30, 5W-20
Oil capacity (with filter changed) 1.5-1.7 litre
Ignition system
Spark plug NGK: BPMR6A
Spark plug gap 0.75 mm (0.029 in)
Spark plug tightening torque 22 Nm; 2.2 kg·m; 16.2 ft·lb
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