Kawasaki FR691V

Kawasaki FR691VThe Kawasaki FR691V is a 0.73 l (726 cc, 44.3 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, such as residential zero-turn mowers, lawn and garden tractors.

The FR691V has 90 degrees V-twin design with vertical PTO shaft, overhead valves, cast iron cylinder liners, spherical combustion chamber and rotating metal grass chopper screen. The engine is equipped with the electronic spark ignition system and internally vented carburetor with fuel shut-off solenoid. The motor uses a high-performance lubrication system and single-stage air filter.

The engine has an automatic compression release (ACR) system with bendix type starter. 13A or 20A charge coils are available as an option.

It has a 78.0 mm (3.07 in) cylinder bore and 76.0 mm (2.99 in) piston stroke. Compression ratio rating is 8.2:1. The Kawasaki FR691V produced 20.9 PS (15.4 kW; 20.6 HP) at 3,600 rpm or 23.4 PS (17.2 kW; 23.0 HP) at 3,600 rpm of maximum horsepower and 53.7 Nm (5.5 kg·m; 39.6 ft·lb) at 2,000 rpm or 53.6 Nm (5.5 kg·m; 39.6 ft·lb) at 2,000 rpm of torque.

General information

Engine Specifications
Model FR691V
Type 4-stroke, OHV, V-twin 90°
Displacement 726 cm 3 (44.3 cu-in)
Max. horsepower 20.9 PS (15.4 KW; 20.6 HP) at 3,600 rpm
23.4 PS (17.2 KW; 23.0 HP) at 3,600 rpm
Max. torque (crank PTO) 53.7 Nm (5.5 kg·m; 39.6 ft·lb) at 2,000 rpm
53.6 Nm (5.5 kg·m; 39.6 ft·lb) at 2,000 rpm
Carburetor Internally vented with fuel shut-off solenoid
Cooling system Air-cooling
Ignition system Electronic spark ignition
Lubricating system Full pressure with spin-on oil filter
Starting system Bendix type starter
Charging system 13A or 20A charge coil (option)
Fuel used Unleaded gasoline (octane number 86 or higher)
Fuel consumption 245 g/HPh
Cooling system Pressurized forced circulation type

Dimensions and Weight

Kawasaki FR691V
Length, mm (in) 501 (19.7)
Width, mm (in) 466 (18.3)
Height, mm (in) 392 (15.4)
Dry weight, kg (lb) 40.0 (88.2)

Tightening torque specs

Tightening torque specs
Cylinder head 46 Nm; 4.6 kg·m; 33.9 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 27.5 Nm; 2.75 kg·m; 20.3 ft·lb
Intake manifold 9 Nm; 0.9 kg·m; 6.6 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: 1.7 litre
Without oil filter: 1.5 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
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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.

17 Comments

    • The Kawasaki manual state’s to use 10W-30 if the outside temperature is 14F to 90F. Use 10W-40 if the outside temperature is 14F to over 104F. I use 10W- 40 since the temperature here in the south in the summer is usually hot and humid. Check your Kawasaki manual if you have one.

  1. I need a shroud for my 691v part number 59066-xxxx. How do I know which one my engine uses? It’s on a cub cadet mower.

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