Oliver 125
The Oliver 125 is a tractor produced by Oliver Lawn Tractors. It is equipped with a 476 cc 29.07 ci engine. The listed engine power is Gasoline (gross): 12 hp / 8.9 kW. Transmission: shaft-driven hydrostatic. Operating weight: 750 to 770 pounds.
Engine Power
Gasoline (gross): 12 hp / 8.9 kW
Fuel & Capacities
2 gal
7.6 L
Transmission
shaft-driven hydrostatic
Operating Weight
750 to 770 pounds
Overview
![]() | 1972 - 1973
Garden tractorJacobsen built
Garden tractor
Jacobsen built |
|---|
Production | |
|---|---|
Distributor | Oliver |
Manufacturer | Jacobsen |
Garden tractor | |
Original price | $1285 (1972 gear) |
$1480 (1972 hydro) | |
Variants | |
|---|---|
125G | gear drive |
125H | hydrostatic |
GT-12 | similar Jacobsen model |
Oliver 125 Engine | |
|---|---|
12HP Kohler 476cc 1-cyl gasoline | |
Fuel tank | 2 gal
7.6 L |
Engine details ... | |
Oliver 125 Transmission | |
|---|---|
4-speed gear | |
Transmission details ... |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Mechanical band brakes | |
Open operator station. |
Tractor hitch | |
|---|---|
Type | sleeve hitch OptOptional |
Power Take-off (PTO) | |
|---|---|
Front PTO | independent |
Clutch | electric |
Front PTO Type | pulley |
Dimensions & Tires | |
|---|---|
Wheelbase | 48 inches
121 cm |
Weight | 750 to 770 pounds |
Front tire | 16x6.50-8 |
Rear tire | 23x8.50-12 |
Full dimensions and tires ... | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
References | |
|---|---|
![]() | |
Operator's Manual 105 and 125 Gear Tractor (462 331) published in 1972 |
Engine
Engine Detail — 476 cc / 29.07 ci Gasoline
Manufacturer | Kohler K301AS |
Fuel Type | Gasoline |
Configuration | 1-cylinder, air-cooled horizontal-shaft |
Displacement | 476 cc
29.07 ci |
Bore/Stroke | 3.375x3.25 inches
86 x 83 mm |
Power (gross) | 12 hp
8.9 kW |
Air cleaner | dry |
Rated RPM | 3600 |
Starter volts | 12 |
Oil capacity | 2.125 qts
2.0 L |
Transmission
Transmission — 4 forward and 1 reverse belt-driven gear
Type | belt-driven gear |
Gears | 4 forward and 1 reverse |
Clutch | idler pulley |
![]() | |
Transmission — shaft-driven hydrostatic
Transmission | shaft-driven hydrostatic |
Gears | infinite forward and reverse |
Dimensions
Oliver 125 Tires | |
|---|---|
Lawn/turf front | 16x6.50-8 |
Lawn/turf rear | 23x8.50-12 |
Dimensions | |
|---|---|
Wheelbase | 48 inches
121 cm |
Length | 71.7 inches
182 cm |
Width | 38 inches*Width at tires
96 cm |
Height (steering wheel) | 41.5 inches
105 cm |
Height (hood) | 36.25 inches
92 cm |
Gear Weight | 750 lbs
340 kg |
Hydro Weight | 770 lbs
349 kg |
Clearance (front axle) | 9.25 inches
23 cm |
Clearance (rear axle) | 8 inches
20 cm |
Attachments
Attachment overview | |
|---|---|
42" mid-mount mower deck | |
50" mid-mount mower deck | |
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 Oliver Lawn Tractors Oliver 125.
Estimated Continuous Field Runtime: 3.2 hrs
Approximately 3.2 hours of continuous field operation at ~75% rated power on a full tank (2 gal / 7.6 L).
Estimated 75% Load Fuel Burn~0.6 gal/hr (2.4 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
Oliver Lawn Tractors Oliver 125 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Oliver Lawn Tractors Oliver 125.
Converted Equivalents:
Horsepower (HP)12 hp
Kilowatts (kW)8.9 kW
Metric Horsepower (PS / CV)12.2 PS
Related models
Oliver lawn tractors 105
- Power:
- 10
- Production years:
- 1972 - 1973
Oliver lawn tractors 145
- Power:
- 14
- Production years:
- 1972 - 1973
Oliver lawn tractors 75
- Power:
- 7
- Production years:
- 1972 - 1973



