The Kawasaki FX850V 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 has V-twin design with vertical PTO shaft. The motor uses overhead V-valves; spherical combustion chamber; cast iron cylinder liners; metal engine cover with integrated clean out ports; rotating metal grass chopper screen. The engine is equipped with electronic spark ignition and twin barrel, internally vented carburetor with fuel shut-off solenoid. The FX850V motor uses a high-performance lubrication system with high-efficiency oil cooler and double or multi-stage canister air filter.
The engine has an automatic compression release (ACR) system with recoil or heavy-duty shift type starter. 13A or 20A charge coils, various speed control systems, oil pressure switches, and various oil drains are available as an option.
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 engine produced 27.1 PS (19.9 kW; 26.6 HP) at 3,600 rpm or 27.3 PS (20.1 kW; 27.0 HP) at 3,600 rpm of maximum horsepower and 63.0 Nm (6.4 kg·m; 46.5 ft·lb) at 2,400 rpm or 60.5 Nm (6.2 kg·m; 44.6 ft·lb) at 2,400 rpm of torque.
General information
| Engine Specifications | |
| Model | FX850V |
| Type | 4-stroke, OHV, V-twin 90° |
| Displacement | 852 cm 3 (51.99 cu-in) |
| Max. horsepower |
27.1 PS (19.9 KW; 26.6 HP) at 3,600 rpm 27.3 PS (20.1 KW; 27.0 HP) at 3,600 rpm |
| Max. torque (crank PTO) |
63.0 Nm (6.4 kg·m; 46.5 ft·lb) at 2,400 rpm 60.5 Nm (6.2 kg·m; 44.6 ft·lb) at 2,400 rpm |
| Carburetor | Twin barrel, internally vented carburetor |
| Cooling system | Air-cooling |
| Ignition system | Electronic spark ignition |
| 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) |
| Fuel consumption | – |
| Cooling system | Pressurized forced circulation type |
Dimensions and Weight
| Kawasaki FX850V | |
| Length, mm (in) | 488 (19.2) |
| Width, mm (in) | 472 (18.6) |
| Height, mm (in) | 626 (24.6) |
| Dry weight, kg (lb) | 56.4 (124.3) |
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 |
Maintenance data
| Engine | |
| Maximum speed | 3500 ± 100 rpm |
| Idle speed | 1500 ± 100 rpm |
| Cylinder compression | 4.5 kg/cm2 (64 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 (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 |
| Ignition system | |
| 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 |
Author:
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