John Deere F912
The John Deere F912 is a tractor produced by John Deere Lawn Tractors. It is equipped with a 658 cc 40.2 ci engine. The listed engine power is Gasoline (listed): 20 hp / 14.9 kW. Transmission: infinite forward and reverse. Operating weight: 1266 lbs 574 kg.
Engine Power
Gasoline (listed): 20 hp / 14.9 kW
Fuel & Capacities
5.5 gal
20.8 L
Transmission
infinite forward and reverse
Operating Weight
1266 lbs
574 kg
Overview
 | 1987 - 1990
F900 SeriesFront-mount mower
F900 Series
Front-mount mower |
|---|
Production | |
|---|---|
Manufacturer | John Deere |
Front-mount mower | |
Built in Horicon, Wisconsin, USA | |
John Deere F912 Engine | |
|---|---|
20HP Yanmar 658cc 3-cyl gasoline | |
Fuel tank | 5.5 gal
20.8 L |
Engine details ...  | |
John Deere F912 Transmission | |
|---|---|
hydrostatic | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Differential lock | mechanical front |
Power steering | |
Drum brakes | |
Open operator station. ROPS available. | |
Power Take-off (PTO) | |
|---|---|
Front PTO | independent |
Clutch | electric |
Dimensions & Tires | |
|---|---|
Wheelbase | 56.3 inches
143 cm |
Weight | 1266 lbs
574 kg |
Front tire | 20x8.00-10 |
Rear tire | 16x6.5-8 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 20 |
Battery volts | 12 |
References | |
|---|---|
 | |
Operator's Manual F912 and F932 Front Mower (OMM79595) published in 1988 | |
Operator's Manual F912 and F932 Front Mower (OMM79696) published in 1990 | |
John Deere Front Mowers published in 1990 | |
Grounds Care & Recreation Products Sales Manual published in 1989, by John Deere |
Engine
Engine Detail — 658 cc / 40.2 ci Gasoline
Manufacturer | Yanmar 3TG66 |
Fuel Type | Gasoline |
Configuration | 3-cylinder, liquid-cooled horizontal-shaft inline |
Displacement | 658 cc
40.2 ci |
Bore/Stroke | 2.60x2.53 inches
66 x 64 mm |
Power | 20 hp
14.9 kW |
Air cleaner | dry |
Torque | 32.3 lb-ft
43.8 Nm |
Torque RPM | 2000 |
Starter | electric |
Starter volts | 12 |
Oil capacity | 2.6 qts
2.5 L |
Coolant capacity | 4.7 qts
4.4 L |
John Deere F912 Engine | |
|---|---|
 |
Transmission
Transmission — infinite forward and reverse hydrostatic
Type | hydrostatic |
Gears | infinite forward and reverse |
Oil capacity | 4.6 qts
4.4 L |
 | |
Dimensions
John Deere F912 Tires | |
|---|---|
Lawn/turf front | 20x8.00-10 |
Lawn/turf rear | 16x6.5-8 |
Dimensions | |
|---|---|
Wheelbase | 56.3 inches
143 cm |
Length | 85.2 inches
216 cm |
Width | 42.8 inches
108 cm |
Height (steering wheel) | 50.5 inches
128 cm |
Height (ROPS) | 78 inches
198 cm |
Weight | 1266 lbs
574 kg |
Attachments
Attachment overview | |
|---|---|
50" front-mount mower deck | |
60" front-mount mower deck | |
Snowblower | |
Blade |
Photos
John Deere F912
Recommended Implements & Sizing Guide
Engineering recommendations for John Deere Lawn Tractors John Deere F912 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 John Deere Lawn Tractors John Deere F912.
Estimated Continuous Field Runtime: 5.3 hrs
Approximately 5.3 hours of continuous field operation at ~75% rated power on a full tank (5.5 gal / 20.8 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
John Deere Lawn Tractors John Deere F912 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere Lawn Tractors John Deere F912.
Converted Equivalents:
Horsepower (HP)20 hp
Kilowatts (kW)14.9 kW
Metric Horsepower (PS / CV)20.3 PS
Direct Competitor Comparison
Compare John Deere F912 against same-era industry alternatives in the same horsepower class.
Current Model
John Deere Lawn Tractors
John Deere F912
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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