The Kawasaki FX751V 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 FX751V 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 cleanout 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 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 oil drains, oil pressure switches, and shaft variations 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 FX751V engine produced 23.8 PS (17.5 kW; 23.4 HP) at 3,600 rpm or 24.9 PS (18.3 kW; 24.5 HP) at 3,600 rpm of maximum horsepower and 62.0 Nm (6.3 kg·m; 45.8 ft·lb) at 2,000 rpm or 60.2 Nm (6.1 kg·m; 44.4 ft·lb) at 2,200 rpm of torque.
General information
| Engine Specifications | |
| Model | FX751V |
| Type | 4-stroke, OHV, V-twin 90° |
| Displacement | 852 cm 3 (51.99 cu-in) |
| Max. horsepower |
23.8 PS (17.5 KW; 23.4 HP) at 3,600 rpm 24.9 PS (18.3 KW; 24.5 HP) at 3,600 rpm |
| Max. torque (crank PTO) |
62.0 Nm (6.3 kg·m; 45.8 ft·lb) at 2,000 rpm 60.2 Nm (6.1 kg·m; 44.4 ft·lb) at 2,200 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 FX751V | |
| 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:
I have a Exmark Lazer Z E-Series with Kawasaki FX751VA66879
FX751V-JS07-R. Is this a Fuel injected motor or Carburetor?
I have a 24.5 or 25 hp Kawasaki motor for my Toro Z 3000 series. Is it ok long term to use 10 % ethanol long term in the motor if I use an additive that is good to keep the fuel from causing problems when storing the gas in the lawnmower over winter, or is this a bad idea? Thanks