The 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.
|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|
|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|
|Maximum speed||3500 ± 100 rpm|
|Idle speed||1500 ± 100 rpm|
|Cylinder compression||4.0 kg/cm2 (56 psi) at 500 rpm|
|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 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|
|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|