UtilityPerformance profile
Shibaura ST321
The Shibaura ST321 is a compact utility tractor designed for various farm and landscaping tasks. It features a 4-wheel drive system and power steering, making it easy to maneuver in tight spaces. The tractor has a 9-forward and 3-reverse gear transmission, giving operators good control over speed and power. Under the hood, the ST321 has a Shibaura S773 diesel engine with 3 cylinders. The engine is liquid-cooled and naturally aspirated, producing 21 horsepower at 2600 RPM. While the engine's power output is below average for its class, its high RPM rating suggests it can handle lighter tasks efficiently. The tractor's compact size, with a length of 107.4 inches and a weight of 1649 pounds, makes it suitable for small to medium-sized farms or properties. It comes equipped with agricultural tires and a Category I hitch, allowing it to work with various attachments. The open center hydraulic system and ROPS (Roll-Over Protective Structure) add to its versatility and safety features.
ManufacturerShibauraPower21 hpEngine3-cylTransGear
Quick specs
- Category
- Utility
- Engine Power Output
- 21hp
- Operating Weight
- 1,649 lb
- Transmission
- Gear
At a glance
How the ST321 compares
vs. Utility medianDistribution
Engine Power (hp)
Across all Utility tractors
21 hp · 9th
This model
9
Median 55 hp
177
This modelUtility tractorsMediann = 5,383
The ST321 ranks at the 9th percentile for engine power among recorded utility tractors.
Overview
About the Shibaura ST321
The Shibaura ST321 is a compact utility tractor designed for various farm and landscaping tasks. It features a 4-wheel drive system and power steering, making it easy to maneuver in tight spaces. The tractor has a 9-forward and 3-reverse gear transmission, giving operators good control over speed and power. Under the hood, the ST321 has a Shibaura S773 diesel engine with 3 cylinders. The engine is liquid-cooled and naturally aspirated, producing 21 horsepower at 2600 RPM. While the engine's power output is below average for its class, its high RPM rating suggests it can handle lighter tasks efficiently. The tractor's compact size, with a length of 107.4 inches and a weight of 1649 pounds, makes it suitable for small to medium-sized farms or properties. It comes equipped with agricultural tires and a Category I hitch, allowing it to work with various attachments. The open center hydraulic system and ROPS (Roll-Over Protective Structure) add to its versatility and safety features.
Full specifications
Every recorded spec
General
| Manufacturer | Shibaura |
|---|---|
| Model | ST321 |
| Category | Utility tractor |
| Type | 4x4 MFWD 4WD |
| Operating weight | 1,649lb |
Engine
| Make | Shibaura |
|---|---|
| Model | S773 |
| Power | 21hp |
| Cylinders | 3 |
| Displacement | 61.3ci |
| Bore | 3.03in |
| Stroke | 2.83in |
Transmission
| Type | Gear |
|---|---|
| Forward gears | 9 |
| Reverse gears | 3 |
Chassis & drive
| Chassis | 4x4 MFWD 4WD |
|---|---|
| Drive | 4WD |
| Steering | Power |
| Cab | ROPS |
Hydraulics
| Type | Open Center |
|---|
Dimensions
| Length | 107.4in |
|---|---|
| Operating weight | 1,649lb |
Tires
| Rear | 16 |
|---|
Capacities
| Cooling system | 0.93gal |
|---|
Head to head
ST321 vs. Utility median
How the Shibaura ST321 compares to other Utility tractors
| Spec | This model | Utility median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 21 hp | 55 hp | -62% | 9th |
| Engine Displacement | 61.3 ci | 183 ci | -67% | 7th |
| Cylinders | 3 | 4 | -25% | 23rd |
| Forward Gears | 9 | 12 | -25% | 35th |
| Operating Weight | 1,649 lb | 5,303 lb | -69% | 8th |
| Length | 107 in | 137 in | -21% | 14th |
Medians and percentiles are computed from the utility tractors in our database with a recorded value for each spec (sample sizes 4,659–5,720 models).
Compare to tractors with similar specs
Commonly compared Shibaura tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Shibaura P21F | 21 hp | — | — | Compare → |
| Shibaura SX21 | 21 hp | 1,530 lb | — | Compare → |
| Shibaura SP2100 | 20.7 hp | 1,190 lb | — | Compare → |
| Shibaura SD1803 | 22 hp | 2,215 lb | — | Compare → |
| Shibaura SD1840 | 22 hp | 2,057 lb | — | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Bobcat CT120 | 21 hp | 2,055 lb | 2008–2010 | Compare → |
| Bolens G212 G2102 | 21 hp | 1,588 lb | — | Compare → |
| Bolens G214 G2104 | 21 hp | 1,676 lb | — | Compare → |
| Branson 2100 | 21 hp | 1,891 lb | — | Compare → |
| Bobcat CT1021 | 21.1 hp | 1,488 lb | — | Compare → |
Explore
Shibaura siblings
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Gallery
Shibaura ST321 photos
FAQ
Common questions
How much horsepower does the Shibaura ST321 have?
The Shibaura ST321 produces 21 hp from its 3-cylinder engine. Engine displacement is 61.3 ci.
What transmission is in the Shibaura ST321?
Transmission on the Shibaura ST321 is Gear, with 9 forward speeds.
What type of hydraulic system does the Shibaura ST321 use?
Hydraulics on the Shibaura ST321 are Open Center.
What size tires does the Shibaura ST321 use?
Factory rubber for the Shibaura ST321 is 16 rear tires.
How much does the Shibaura ST321 weigh?
The Shibaura ST321 weighs about 1,649 lb in operating condition.
What maintenance does the Shibaura ST321 require?
Like any tractor, the Shibaura ST321 needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.