Roper L121
The Roper L121 is a tractor produced by Roper Lawn Tractors. It is equipped with a 388 cc 23.7 ci engine. The listed engine power is Gasoline (listed): 11 hp / 8.2 kW. Transmission: 3 forward and 1 reverse. Operating weight: 394 lbs 178 kg.
Engine Power
Gasoline (listed): 11 hp / 8.2 kW
Fuel & Capacities
1.1 gal
4.2 L
Transmission
3 forward and 1 reverse
Operating Weight
394 lbs
178 kg
Overview
 | 1979 - 1981
Lawn tractor |
|---|
Production | |
|---|---|
Manufacturer | Roper |
Lawn tractor | |
Built in Orangeburg, South Carolina, USA | |
Roper L121 Engine | |
|---|---|
11HP Briggs & Stratton 388cc gasoline | |
Fuel tank | 1.1 gal
4.2 L |
Engine details ...  | |
Roper L121 Transmission | |
|---|---|
3-speed | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Open operator station. |
Dimensions & Tires | |
|---|---|
Wheelbase | 43.5 inches
110 cm |
Weight | 394 lbs
178 kg |
Front tire | 15.0x6.0 |
Rear tire | 18x9.5 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
References | |
|---|---|
 | |
Tractor and Accessories for 1980 published by Roper | |
The Season Veterans published in 1981, by Roper | |
Parts and "We Care" Service published in 1986 |
Engine
Engine Detail — 388 cc / 23.7 ci Gasoline
Manufacturer | Briggs & Stratton |
Fuel Type | Gasoline |
Configuration | air-cooled |
Displacement | 388 cc
23.7 ci |
Power | 11 hp
8.2 kW |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission — 3 forward and 1 reverse
Gears | 3 forward and 1 reverse |
 | |
Dimensions
Roper L121 Tires | |
|---|---|
Lawn/turf front | 15.0x6.0 |
Lawn/turf rear | 18x9.5 |
Dimensions | |
|---|---|
Wheelbase | 43.5 inches
110 cm |
Length | 63 inches
160 cm |
Width | 48 inches
121 cm |
Height | 40 inches
101 cm |
Shipping weight | 394 lbs
178 kg |
Attachments
36" Mower deck | |
|---|---|
Type | mid-mount Roper LA019AR |
2-blade with manual lift | |
Cutting width | 36 inches
91 cm |
Photos
Roper L121 tractor photo
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Roper Lawn Tractors Roper L121.
Estimated Continuous Field Runtime: 1.9 hrs
Approximately 1.9 hours of continuous field operation at ~75% rated power on a full tank (1.1 gal / 4.2 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
Roper Lawn Tractors Roper L121 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Roper Lawn Tractors Roper L121.
Converted Equivalents:
Horsepower (HP)11 hp
Kilowatts (kW)8.2 kW
Metric Horsepower (PS / CV)11.2 PS
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