The Cub Cadet Big Country 6×4 Utility Vehicle Model 640 is a robust and versatile UTV designed for heavy-duty tasks and challenging terrains. This model features a powerful Honda 20 HP, 4-cycle gas engine that delivers a maximum torque of 32.5 lb-ft at 2500 rpm. With a displacement of 37.5 cubic inches (614cc), the engine is built for efficiency and durability, ensuring reliable performance across a range of applications.
The vehicle’s dimensions are designed to balance stability and maneuverability, with an overall length of 110.4 inches and a width of 65 inches. The high-back seats accommodate two passengers comfortably, and the vehicle boasts a payload capacity of 1,400 pounds, making it suitable for transporting heavy loads. The towing capacity stands at 1,200 pounds, further enhancing its utility.
Cub Cadet 640 Big Country 6×4 Engine Specs
| Engine Make | Honda ** | Kohler |
| Engine Power | 20 hp | 20 hp |
| Maximum Torque | 32.5 lb-ft @ 2500 rpm | 32.6 lb-ft @ 2600 rpm |
| Engine Type | 4-Cycle Gas | 4-Cycle Gas |
| Cylinders | 2 | 2 |
| Valves | Overhead | Overhead |
| Engine Displacement | 37.5 cu. in. (614 cc) | 38 cu. in. (624 cc) |
| Ignition | Transistor Controlled | Transistor Controlled |
| Lubrication | Full Pressure | Full Pressure |
| Oil Filter | Replaceable (standard) | Replaceable (standard) |
| RPM, idle (no load) | 1400 rpm | 1250 rpm |
| RPM, fast (no load) | 3850 rpm | 3950 rpm |
| Cooling System | Air | Air |
| Air Cleaner | Heavy Duty, Replaceable, Dual Element | Heavy Duty, Replaceable, Dual Element |
** Cub Cadet Big Country 6×4 Utility Vehicle Model 640 / 37AS640C100
Cub Cadet 640 Big Country 6×4 Electrical System
| Battery | 30 A/hr, 365 cold cranking amps |
| Alternator | 12 V 20 A Regulated |
| Headlights | Two 37.5 watt Halogen |
| Wiring | Automotive Style Fused Control System |
Cub Cadet 640 Big Country 6×4 UTV Dimensions
| Overall Length | 110.4” (280.4 cm) |
| Overall Width | 65.0” (165.1 cm) |
| Front-Tread Centers | 50.0” (127 cm) |
| Rear-Tread Centers | 52.0” (132.1 cm) |
| Overall Height | 41” (104.1 cm) |
| Wheel Base | 84.0” (213.4 cm) |
| Weight (including fuel/fluids) | 1,552 lbs. (704.2 kg) |
| Ground Clearance (Under Transaxle) | 6.4” (16.3 cm) |
| Ground Clearance (Under Foot Platform) | 7.5” (19.1 cm) |
| Seating Capacity | 2 persons |
| Seat Type | High Back |
| Turn Clearance Circle | 23.0 ft (7.0 m) |
| Towing Capacity | 1,200 lb (545.5 kg) |
| Payload Capacity | 1,400 lb (636.4 kg) |
Cub Cadet Big Country 6×4 Utility Vehicle Cargo Box
| Material | 14-Gauge Steel |
| Attachment | Rubber Isolated |
| Cargo Box Volume Capacity | 13.3 cu ft (0.38 m3) |
| Cargo Box Weight Capacity | 1,000 lb (453.6 kg) |
Cub Cadet 6×4 Big Country 640 Transmission Specs
| Transmission Type | Continuously Variable (CVT) |
| Differential Lock | Standard, Hand Operated |
| Max Speed | 19 mph (30.6 km/h) |
| Transaxle | Fully enclosed, Oil Bath |
| Gear Selection | Forward, Neutral, Reverse |
| Overall Reduction Ratio | Low: 73.8:1, High: 16.5:1 |
| Drive Chain | No. 60 Industrial Roller Chain |
| Rear Axle Housing | Welded Steel |
| Steering | Rack & Pinion w/ Ackerman-Type Geometry |
| Front Suspension | Independent, spring over shock, single A-arm |
| Rear Suspension | Fully Independent w/ Coil Over Shocks |
| Brakes | Wet Disk in Transaxle |
| Parking Brake | Foot Operated |
| Fuel Gauge | Located Under Seat |
| Low Fuel Indicator | Dash Indicator Light |
| Fuel Tank Capacity | 5.7 gal (21.6 L) |
Equipped with a Continuously Variable Transmission (CVT) and a standard hand-operated differential lock, the Big Country 6×4 UTV ensures smooth and controlled driving experiences. The fully independent suspension with coil-over shocks and the wet disk brakes in the transaxle provide excellent handling and stopping power.
Additional features include a 14-gauge steel cargo box with a capacity of 1,000 pounds and a volume of 13.3 cubic feet, as well as a 5.7-gallon fuel tank with a convenient dash indicator light for low fuel levels. The UTV also incorporates modern electrical components such as a 30-amp/hr battery, 12V-20amp regulated alternator, and two 37.5-watt halogen headlights, ensuring it meets the demands of both daytime and nighttime operations.
The Cub Cadet Big Country 6×4 Utility Vehicle Model 640 is engineered to provide superior performance, durability, and versatility for a variety of agricultural, industrial, and recreational uses.
got a used big country 6 wheel, I’m pretty sure fule pump is junk, looks like they replaced it… but, the one that’s on it is on the outside of gas tank and they put it on top of the gas tank.. question I have… is the fule pump supposed to be inside the gas tank, or did they modify it by putting a different type of fule pump on it.. thanks for any help
Hi, Barb. Sorry for the long reply. The fuel pump (KM-49040-2065) on the Cub Cadet Model 640 is located outside the fuel tank