The Kawasaki FH580V 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 Kai’s are the newer series engine. The Japanese word “KAI” means evolution, advancement and renewal.
The FH580V KAI engine is based on the FH580V 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 FH580V KAI has V-twin 90° design with vertical PTO shaft, cast-iron cylinder liners, and overhead V-valves. The engine is equipped with inner vent carburetor and electronic spark ignition system. The motor uses a full pressure lubrication system with spin-on oil filter and dual element air cleaner.
The engine has automatic compression release (ACR) system with recoil or electric starter (12V bendix starter with 12V-15A charging coil 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 FH580V KAI produced 19.3 PS (14.2 kW; 19.0 HP) at 3,600 rpm of maximum horsepower and 49.6 Nm (5.06 kg·m; 36.6 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||19.3 PS (14.2 KW; 19.0 HP) at 3,600 rpm|
|Max. torque (crank PTO)||49.6 Nm (5.06 kg·m; 36.6 ft·lb) at 2,000 rpm|
|Carburetor||Inner vent carburetor|
|Ignition system||Electronic spark ignition|
|Lubricating system||Full pressure with spin-on oil filter|
|Starting system||Recoil or electric starter|
|Charging system||12V-15A 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|