Allis Chalmers 811GT
The Allis Chalmers 811GT is a tractor produced by Allis Chalmers Lawn Tractors. It is equipped with a 399 cc 24.36 ci engine. The listed engine power is Gasoline (gross): 11 hp / 8.2 kW. Transmission: 3 forward and 1 reverse. Operating weight: 438 lbs*Weight of tractor only. 198 kg.
Engine Power
Gasoline (gross): 11 hp / 8.2 kW
Fuel & Capacities
2.2 gal
8.3 L
Transmission
3 forward and 1 reverse
Operating Weight
438 lbs*Weight of tractor only.
198 kg
Overview
![]() | 1979 - 1981
800GT SeriesGarden tractor
800GT Series
Garden tractor |
|---|
Production | |
|---|---|
Manufacturer | Allis Chalmers |
Garden tractor | |
Built in Port Washington, Wisconsin, USA | |
Original price was $1,466 in 1979 | |
Allis Chalmers 811GT Engine | |
|---|---|
11HP Briggs & Stratton 399cc 1-cyl gasoline | |
Fuel tank | 2.2 gal
8.3 L |
Engine details ... | |
Allis Chalmers 811GT Transmission | |
|---|---|
3-speed gear | |
Transmission details ... |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Mechanical band brakes | |
Open operator station. |
Power Take-off (PTO) | |
|---|---|
Mid PTO | independent |
Clutch | mechanical idler pulley |
Dimensions & Tires | |
|---|---|
Wheelbase | 45.5 inches
115 cm |
Weight | 438 lbs
198 kg |
Front tire | 15x6.00-6 |
Rear tire | 20x8.00-10 |
Full dimensions and tires ... | |
Electrical | |
|---|---|
Ground | negative |
Charging amps | 3 |
Battery volts | 12 |
Battery AH | 39 |
References | |
|---|---|
![]() | |
Operator's Manual Model 800GT Series (1666091) published in 1979 | |
Lawn and Garden Tractors published in 1979, by Allis-Chalmers | |
Lawn & Garden Tractors published in 1980, by Allis-Chalmers |
Engine
Engine Detail — 399 cc / 24.36 ci Gasoline
Manufacturer | Briggs & Stratton 252707 |
Fuel Type | Gasoline |
Configuration | 1-cylinder, air-cooled vertical-shaft |
Displacement | 399 cc
24.36 ci |
Bore/Stroke | 3.4375x2.625 inches
87 x 67 mm |
Power (gross) | 11 hp
8.2 kW |
Rated RPM | 3400 |
Idle RPM | 1750-3400 |
Starter | electric |
Starter volts | 12 |
Allis Chalmers 811GT Engine | |
|---|---|
![]() |
Transmission
Transmission — 3 forward and 1 reverse belt-driven gear
Type | belt-driven gear |
Gears | 3 forward and 1 reverse |
![]() | |
Dimensions
Allis Chalmers 811GT Tires | |
|---|---|
Lawn/turf front | 15x6.00-6 |
Lawn/turf rear | 20x8.00-10 |
Dimensions | |
|---|---|
Wheelbase | 45.5 inches
115 cm |
Length | 66.25 inches
168 cm |
Width | 33.5 inches
85 cm |
Height (steering wheel) | 40 inches
101 cm |
Height (hood) | 34.5 inches
87 cm |
Weight | 438 lbs*Weight of tractor only.
198 kg |
Attachments
Attachment overview | |
|---|---|
36" mid-mount mower deck | |
42" mid-mount mower deck | |
Snowblower | |
Blade | |
Garden tractors are capable of using tillers, plows, or other ground-engaging attachments. TractorData does not list details of these attachments. |
Photos
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Allis Chalmers Lawn Tractors Allis Chalmers 811GT.
Estimated Continuous Field Runtime: 3.8 hrs
Approximately 3.8 hours of continuous field operation at ~75% rated power on a full tank (2.2 gal / 8.3 L).
Estimated 75% Load Fuel Burn~0.6 gal/hr (2.2 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Allis Chalmers Lawn Tractors Allis Chalmers 811GT Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Allis Chalmers Lawn Tractors Allis Chalmers 811GT.
Converted Equivalents:
Horsepower (HP)11 hp
Kilowatts (kW)8.2 kW
Metric Horsepower (PS / CV)11.2 PS
Related models
Allis Chalmers lawn tractors B-10
- Power:
- 9
- Production years:
- 1963 - 1968
Allis Chalmers lawn tractors 1036
- Power:
- 10
- Production years:
- 1982 - 1985
Allis Chalmers lawn tractors 310
- Power:
- 10
- Production years:
- 1971 - 1973
Allis Chalmers lawn tractors 410
- Power:
- 10
- Production years:
- 1973 - 1973
Allis Chalmers lawn tractors 610
- Power:
- 10
- Production years:
- 1974 - 1976




