The Kawasaki FX850V-EFI is a 0.85 l (852 cc, 51.99 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, commercial mowers, heavy-duty industrial and construction equipment.
The Kawasaki FX850V-EFI has V-twin design with vertical PTO shaft. The motor uses overhead V-valves; spherical combustion chamber; cast iron cylinder liners; integrated clean out ports; proven open loop design. The engine is equipped with sequential multi-port fuel injection; integrated electronic governor; automatic compression release; compact electronic control unit; electronic altitude compensation; electronic ignition system with variable spark timing. The FX850V EFI motor uses a pressurized lubrication system and high-pressure fuel injection system with an electronic fuel pump.
The engine has an automatic compression release (ACR) system with a relectric starter.
An 84.5 mm (3.33 in) cylinder bore and 76.0 mm (2.99 in) piston stroke give the motor a total of 852 cc (51.99 cu-in) of displacement. Compression ratio rating is 8.2:1. The Kawasaki FX850V EFI engine produced 29.9 PS (22.0 kW; 29.5 HP) at 3,600 rpm of maximum horsepower and 65.7 Nm (6.7 kg·m; 48.5 ft·lb) at 2,600 rpm of torque.
|Type||4-stroke, OHV, V-twin 90°|
|Displacement||852 cm 3 (51.99 cu-in)|
|Max. horsepower||29.9 PS (22.0 KW; 29.5 HP) at 3,600 rpm|
|Max. torque (crank PTO)||65.7 Nm (6.7 kg·m; 48.5 ft·lb) at 2,600 rpm|
|Fuel system||Sequential multi-port fuel injection|
|Ignition system||Electronic ignition system with variable spark timing|
|Lubricating system||High performance lubrication system|
|Starting system||Heavy duty shift type starter|
|Charging system||13A or 20A charge coil (option)|
|Fuel used||Unleaded gasoline (octane number 91 or higher)|
|Cooling system||Pressurized forced circulation type|
Tightening torque specs
|Tightening torque specs||Cylinder head||46 Nm; 4.6 kg·m; 33.9 ft·lb|
|Connecting rod||20.6 Nm; 2.1 kg·m; 15.2 ft·lb|
|Flywheel||56 Nm; 5.7 kg·m; 41.3 ft·lb|
|Crankcase cover||46 Nm; 4.6 kg·m; 33.9 ft·lb|
|Intake manifold||6 Nm; 0.6 kg·m; 4.4 ft·lb|
|Oil drain plug||7 Nm; 0.7 kg·m; 5.2 ft·lb|
|Valve clearance lock nut||11 Nm; 1.1 kg·m; 8.1 ft·lb|
|Maximum speed||3500 ± 100 rpm|
|Idle speed||1500 ± 100 rpm|
|Cylinder compression||4.5 kg/cm2 (64 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 (SJ or higher class)|
|Recommended oil||SAE 10W-40, 10W-30|
|Oil capacity (with filter changed)||
With oil filter: 2.3 litre
Without oil filter: 2.1 litre
|Spark plug||NGK: BPR4ES|
|Spark plug gap||0.7-0.8 mm (0.027-0.031 in)|
|Ignition coil air gap||0.2-0.4 mm (0.008-0.011 in)|
|Spark plug tightening torque||22 Nm; 2.2 kg·m; 16.2 ft·lb|
We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.
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