Cub Cadet 1250 lawn tractor specs and service data

The Cub Cadet 1250 is a lawn tractor model from the Quietline series, manufactured from 1974 to 1980 by Cub Cadet (a part of International Harvester) in Louisville, Kentucky, USA. It was available in a two-wheel drive (2WD) version.

The Cub Cadet 1250 is equipped with a 476 L (29.0 cu·in) single-cylinder gasoline engine with 85.7 mm (3.37 in) of the cylinder bore and 82.6 mm (3.25 in) of the piston stroke, and a hydrostatic transmission with infinite forward and reverse gears.

The Cub Cadet 1250 lawn tractor features:

The Kohler K301AQS gasoline engine which produces 12.1 PS (8.9 kW; 12.0 HP) at 3,400 rpm of horsepower
Manual steering
Dry disc brakes (before 1977) or Wet disc brakes (after 1977)
Open operator station
Sleeve hitch (optional)
Independent front PTO with electric clutch and 3,400 rpm

General specifications

General Specifications
Model	Cub Cadet 1250
Tractor type	Lawn tractor
Production years	1974-1980
Factory	Louisville, Kentucky, USA
Dimensions and weight
Length	1,750 mm (68.9 in)
Width	930 mm (36.6 in)
Height	1,040 mm (40.9 in)
Wheel base	1,110 mm (43.7 in)
Ground clearance	150 mm (5.9 in)
Weight	–
Fuel capacity
Fuel tank capacity	7.5 liters (2 US gal.; 1.6 Imp. gal)

Engine

Engine Specifications
Engine model	Kohler K301AQS
Engine type	4-stroke, L-head (side valve), single-cylinder
Displacement	476 cm³, (29.0 cu·in)
Bore and stroke	85.7 mm X 82.6 mm (3.37 in X 3.25 in)
Compression ratio	6.0:1
Max. horsepower	12.2 PS (9.0 kW; 12.0 HP) at 3,600 rpm
Cooling system	Forced air
Lubricating system	Splash type
Fuel system	Carburetor
Starting system	Electirc starter
Compression pressure
Normal:	7.7-8.4 kg/cm² (7.6-8.3 bar, 110-120 psi) / 1,000 rpm
Valve clearance
Intake valve clearance:	0.20-0.25 mm (0.0079-0.0098 in)
Exhaust valve clearance:	0.43-0.48 mm (0.0169-0.0189 in)
Oil system
Lubrication system:	Splash type
Oil type:	API SF or SG
Recommended oil:	Summer: SAE 30W Winter: SAE 5W-20, 5W-30
Oil capacity:	1.4 L (1.5 US. qt, 1.2 Imp. qt.)
Ignition system
Spark plug:	Champion RH10
Spark plug gap:	0.65 mm (0.0256 in)
Spark plug torque:	27 N·m (2.8 kg·m, 19.9 ft·lb)

Transmission and chassis

Chassis, steering and brakes
Chassis	4×2 2WD
Steering type	Manual
Brakes	Dry disc (before 1977) Wet disc (after 1977)
Transmission
Transmission manufacturer or model	–
Transmission type	Hydrostatic
Gears	Infinite forward and reverse
Speed	Forward: 12.9 kmh (8 mph) Reverse: 6.4 kmh (4 mph)
Transmission oil capacity	6.6 L (1.7 US. gal, 1.5 Imp. gal.)

Tires

Tires
Front tires	Lawn/turf: 4.80/4.00-8
Rear tires	Lawn/turf: 23×8.50-12

Rear Hitch

Three-Point Hitch
Category	Sleeve hitch (optional)

PTO (Power take-off shaft)

PTO
Front PTO type	Independent with electric clutch
Front PTO speed	3,400 rpm

Electrical system

Electrical system
Ground	Negative
Charging system	Flywheel alternator
Charging amps	15A
Battery	12V

Serial numbers

Cub Cadet 1250 serial numbers
1974	530001
1975	536073
1976	572840
1977	602118
1978	621744
1979	643507

Attachments

Cub Cadet 38A: 38″ mid-mount mower deck with 3-blade and manual or electric (optional) lift
Cutting width	960 mm (38 in)
Cut height	30-110 mm (1.5-4.5 in)
Cub Cadet 44A: 44″ mid-mount mower deck with 3-blade and manual or electric (optional) lift
Cutting width	1,110 mm (44 in)
Cut height	20-100 mm (1-4 in)
Cub Cadet 50A: 50″ mid-mount mower deck with 3-blade and manual or electric (optional) lift
Width	1,270 mm (50 in)
Cut height	20-100 mm (1-4 in)
Cub Cadet 42″ front-mount blade
Width	1,060 mm (42 in)
Cub Cadet QA-36A: 36″ front-mount snow blower with manual lift
Width	910 mm (36 in)
Cub Cadet QA-42A: 42″ front-mount snow blower with manual lift
Width	1,060 mm (42 in)

Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

Cub Cadet 1250