Cub Cadet GT 2521
The Cub Cadet GT 2521 is a tractor produced by Cub Cadet Lawn Tractors. It is equipped with a 626 cc 38.2 ci engine. The listed engine power is Gasoline (gross): 21 hp / 15.7 kW. Transmission: infinite forward and reverse. Operating weight: 191 lbs 86 kg.
Engine Power
Gasoline (gross): 21 hp / 15.7 kW
Fuel & Capacities
2.1 gal
7.9 L
Transmission
infinite forward and reverse
Operating Weight
191 lbs
86 kg
Overview
 | 2004
2500 SeriesGarden tractor
2500 Series
Garden tractor |
|---|
Production | |
|---|---|
Manufacturer | Cub Cadet (a part of MTD) |
Garden tractor | |
Cub Cadet GT 2521 Engine | |
|---|---|
21HP Vanguard 626cc 2-cyl gasoline | |
Fuel tank | 2.1 gal
7.9 L |
Engine details ...  | |
Cub Cadet GT 2521 Transmission | |
|---|---|
hydrostatic | |
Transmission details ...  |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
External disc brakes | |
Open operator station. |
Tractor hitch | |
|---|---|
Type | sleeve hitch OptOptional |
Power Take-off (PTO) | |
|---|---|
Front PTO | independent |
Clutch | electric |
Dimensions & Tires | |
|---|---|
Wheelbase | 47 inches
119 cm |
Weight | 529 lbs
239 kg |
Front tire | 16x6.5-8 |
Rear tire | 23x9.5-12 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 15 |
Battery volts | 12 |
References | |
|---|---|
 | |
Outdoor Power Equipment published in 2004, by Cub Cadet |
Engine
Engine Detail — 626 cc / 38.2 ci Gasoline
Manufacturer | Vanguard 381777 |
Fuel Type | Gasoline |
Configuration | 2-cylinder, air-cooled |
Displacement | 626 cc
38.2 ci |
Bore/Stroke | 2.97x2.76 inches
75 x 70 mm |
Power (gross) | 21 hp
15.7 kW |
Rated RPM | 3350 |
Idle RPM | 1400-3600 |
Starter | electric |
Starter volts | 12 |
Sparkplug gap | 0.030 inches
0.762 mm |
Oil capacity | 1.5 qts
1.4 L |
Oil change | 50 h |
Transmission
Transmission — infinite forward and reverse shaft-driven hydrostatic
Type | shaft-driven hydrostatic |
Gears | infinite forward and reverse |
Oil capacity | 6 qts
5.7 L |
 | |
Dimensions
Cub Cadet GT 2521 Tires | |
|---|---|
Lawn/turf front | 16x6.5-8 |
Lawn/turf rear | 23x9.5-12 |
Dimensions | |
|---|---|
Wheelbase | 47 inches
119 cm |
Length | 72 inches
182 cm |
Width | 56 inches
142 cm |
Height (steering wheel) | 43 inches
109 cm |
Weight | 529 lbs
239 kg |
Ground clearance | 6 inches
15 cm |
4-bolt rear axle | 1 inch diameter
25 mm |
Attachments
Attachment overview | |
|---|---|
48" 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. |
48" Mower deck | |
|---|---|
Type | mid-mount Cub Cadet 190-301 |
manual lift | |
Cutting width | 48 inches
121 cm |
Weight | 191 lbs
86 kg |
Photos
Cub Cadet GT 2521
Cub Cadet GT 2521
Cub Cadet GT 2521
Recommended Implements & Sizing Guide
Engineering recommendations for Cub Cadet Lawn Tractors Cub Cadet GT 2521 based on its 21 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 Cub Cadet Lawn Tractors Cub Cadet GT 2521.
Estimated Continuous Field Runtime: 1.9 hrs
Approximately 1.9 hours of continuous field operation at ~75% rated power on a full tank (2.1 gal / 7.9 L).
Estimated 75% Load Fuel Burn~1.1 gal/hr (4.1 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
Cub Cadet Lawn Tractors Cub Cadet GT 2521 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Cub Cadet Lawn Tractors Cub Cadet GT 2521.
Converted Equivalents:
Horsepower (HP)21 hp
Kilowatts (kW)15.7 kW
Metric Horsepower (PS / CV)21.3 PS
Direct Competitor Comparison
Compare Cub Cadet GT 2521 against same-era industry alternatives in the same horsepower class.
Current Model
Cub Cadet Lawn Tractors
Cub Cadet GT 2521
Engine Power:Gasoline (gross): 21 hp / 15.7 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester D-219
Engine Power:19
Production Years:1962 - 1966
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