Ingersoll 4120
The Ingersoll 4120 is a tractor produced by Ingersoll Lawn Tractors. It is equipped with a 781 cc 47.7 ci engine. The listed engine power is Gasoline (listed): 20 hp / 14.9 kW. Transmission: Hy-Drive. Operating weight: 723 lbs 327 kg.
Engine Power
Gasoline (listed): 20 hp / 14.9 kW
Fuel & Capacities
3 gal
11.4 L
Transmission
Hy-Drive
Operating Weight
723 lbs
327 kg
Overview
 | 1992 - 1993
4100 SeriesGarden tractor
4100 Series
Garden tractor |
|---|
Production | |
|---|---|
Manufacturer | Ingersoll |
Garden tractor | |
Built in Winneconne, Wisconsin, USA | |
Ingersoll 4120 Engine | |
|---|---|
20HP Onan 781cc 2-cyl gasoline | |
Engine details ...  |
Ingersoll 4120 Transmission | |
|---|---|
hydraulic drive | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Power steering | |
Open operator station. |
Capacity | |
|---|---|
Fuel | 3 gal
11.4 L |
Hydraulic system | 1.5 gal
5.7 L |
Hydraulics | |
|---|---|
Type | open center |
Capacity | 1.5 gal
5.7 L |
Pressure | 575 psi
39.6 bar |
Total flow | 11.5 gpm
43.5 lpm |
Steering press. | 720 psi
49.6 bar |
Dimensions & Tires | |
|---|---|
Wheelbase | 48 inches
121 cm |
Weight | 723 lbs
327 kg |
Front tire | 16x6.50-8 |
Rear tire | 8.00-16 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | flywheel alternator |
Charging amps | 20 |
Battery CCA | 300 |
Battery volts | 12 |
References | |
|---|---|
 | |
Operator;s Manual Compact Tractors 3118, 4116, 4118, 4120 (8-56800) published in 1992 |
Engine
Engine Detail — 781 cc / 47.7 ci Gasoline
Manufacturer | Onan P220G |
Fuel Type | Gasoline |
Configuration | 2-cylinder, air-cooled horizontal-shaft horizontally-opposed |
Displacement | 781 cc
47.7 ci |
Bore/Stroke | 3.25x2.875 inches
83 x 73 mm |
Power | 20 hp
14.9 kW |
Rated RPM | 3600 |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission — Hy-Drive
Transmission | Hy-Drive |
Type | hydraulic drive |
Gears | infinite forward and reverse |
 | |
Dimensions
Ingersoll 4120 Tires | |
|---|---|
Lawn/turf front | 16x6.50-8 |
Lawn/turf rear | 8.00-16 |
Dimensions | |
|---|---|
Wheelbase | 48 inches
121 cm |
Length | 72 inches
182 cm |
Width | 41 inches
104 cm |
Height (steering wheel) | 43.5 inches
110 cm |
Height (hood) | 38.5 inches
97 cm |
Weight | 723 lbs
327 kg |
Ground clearance | 11 inches
27 cm |
Front tread | 33.5 inches
85 cm |
Rear tread | 31.5 inches
80 cm |
Photos
Ingersoll 4120
Recommended Implements & Sizing Guide
Engineering recommendations for Ingersoll Lawn Tractors Ingersoll 4120 based on its 20 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. |
Disc HarrowSecondary Tillage | 5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片) | Light Duty | Small acreage soil break-up and secondary aeration. |
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 Ingersoll Lawn Tractors Ingersoll 4120.
Estimated Continuous Field Runtime: 2.9 hrs
Approximately 2.9 hours of continuous field operation at ~75% rated power on a full tank (3 gal / 11.4 L).
Estimated 75% Load Fuel Burn~1 gal/hr (3.9 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
Ingersoll Lawn Tractors Ingersoll 4120 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Ingersoll Lawn Tractors Ingersoll 4120.
Converted Equivalents:
Horsepower (HP)20 hp
Kilowatts (kW)14.9 kW
Metric Horsepower (PS / CV)20.3 PS
Direct Competitor Comparison
Compare Ingersoll 4120 against same-era industry alternatives in the same horsepower class.
Current Model
Ingersoll Lawn Tractors
Ingersoll 4120
Engine Power:Gasoline (listed): 20 hp / 14.9 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester 184 Lo-Boy
Engine Power:18
Production Years:1977 - 1980
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