Roper GT18
The Roper GT18 is a tractor produced by Roper Lawn Tractors. It is equipped with a 693 cc 42.33 ci engine. The listed engine power is Gasoline (gross): 18 hp / 13.4 kW. Transmission: 6 forward and 2 reverse.
Engine Power
Gasoline (gross): 18 hp / 13.4 kW
Fuel & Capacities
3 gal
11.4 L
Transmission
6 forward and 2 reverse
Overview
 | 1984 - 1988
Garden tractor |
|---|
Production | |
|---|---|
Manufacturer | Roper |
Garden tractor | |
Built in Orangeburg, South Carolina, USA | |
Variants | |
|---|---|
GT18 | Briggs |
GTK18 | Kohler |
Roper GT18 Engine | |
|---|---|
18HP Briggs & Stratton 693cc 2-cyl gasoline | |
Fuel tank | 3 gal
11.4 L |
Engine details ...  | |
Roper GT18 Transmission | |
|---|---|
6-speed gear | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Open operator station. |
Tractor hitch | |
|---|---|
Type | sleeve hitch OptOptional |
Power Take-off (PTO) | |
|---|---|
Front PTO | independent |
Clutch | electric |
Dimensions & Tires | |
|---|---|
Wheelbase | 45.5 inches
115 cm |
Front tire | 16x6.50 |
Rear tire | 23x10.50 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
Battery AH | 30 |
References | |
|---|---|
 | |
Outdoor Power Products published in 1984, by Roper | |
GT18 Garden Tractor published by Roper |
Engine
Engine Detail — 693 cc / 42.33 ci Gasoline
Manufacturer | Briggs & Stratton 422437 |
Fuel Type | Gasoline |
Configuration | 2-cylinder, air-cooled horizontal-shaft |
Displacement | 693 cc
42.33 ci |
Bore/Stroke | 3.44x2.28 inches
87 x 58 mm |
Power (gross) | 18 hp
13.4 kW |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission — 6 forward and 2 reverse belt-driven gear
Type | belt-driven gear |
Gears | 6 forward and 2 reverse |
Dimensions
Roper GT18 Tires | |
|---|---|
Lawn/turf front | 16x6.50 |
Lawn/turf rear | 23x10.50 |
Dimensions | |
|---|---|
Wheelbase | 45.5 inches
115 cm |
Attachments
Attachment overview | |
|---|---|
44" 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. |
44" Mower deck | |
|---|---|
Type | mid-mount Roper TR440AR |
3-blade with manual lift | |
Cutting width | 44 inches
111 cm |
Cut height | 1.3 to 4.5 inch
3 to 11 cm |
Photos
Roper GT18
Recommended Implements & Sizing Guide
Engineering recommendations for Roper Lawn Tractors Roper GT18 based on its 18 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 1 to 2 Bottom (12")1 - 2 铧 (30 cm) | Light Duty | Ideal for garden plots and light sandy soil. |
Rotary Cutter / MowerMowing & Clearing | 4 ft (48 in)1.2 m | Light Duty | Pasture clipping and light brush under 1" diameter. |
Rotary TillerSeedbed Prep | 42 to 48 in105 - 120 cm | Light Duty | Covers compact tractor tire width. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Roper Lawn Tractors Roper GT18.
Estimated Continuous Field Runtime: 3.2 hrs
Approximately 3.2 hours of continuous field operation at ~75% rated power on a full tank (3 gal / 11.4 L).
Estimated 75% Load Fuel Burn~0.9 gal/hr (3.5 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 GT18 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Roper Lawn Tractors Roper GT18.
Converted Equivalents:
Horsepower (HP)18 hp
Kilowatts (kW)13.4 kW
Metric Horsepower (PS / CV)18.2 PS
Direct Competitor Comparison
Compare Roper GT18 against same-era industry alternatives in the same horsepower class.
Current Model
Roper Lawn Tractors
Roper GT18
Engine Power:Gasoline (gross): 18 hp / 13.4 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester Type A 15HP
Engine Power:16.7
Production Years:1908 - 1911
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