Compare Mowers
List prices are the manufacturer’s published figures, re-checked daily; they exclude tax, freight and dealer setup.
A side-by-side reference of each model's stated specifications. MowerFacts doesn’t give opinions: where a published, spec-derived rule can separate machines we mark a Data Pick and show the rule; here, read the values and decide what fits your needs.
Best suited for
What each model is built for, from its duty class and key specs. This is a neutral reference — MowerFacts does not rank one model above another.
- Scag Liberty Z — commercial: daily paid use and high acreage; 36-inch deck; gas powered
- Grasshopper 125VB — commercial: daily paid use and high acreage; 41-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Liberty Z uses a Kawasaki® FR Series engine; 125VB uses a Briggs & Stratton engine. The engine maker builds the engine; the mower maker chooses the model, rating and fit, so the badge alone does not settle output or longevity.
- Liberty Z lists at $5,599 to $7,399; 125VB lists at $8,760, a $3,161 difference. List price is the maker's own figure before tax, freight and dealer setup. Dealers set the final price.
- Liberty Z weighs 555 lbs (251.7 kg); 125VB weighs 700 lbs (317.5 kg), a 145 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Liberty Z's weight means for a trailer ›
- Liberty Z has a 36 in (914 mm) deck; 125VB has a 41 in (1,041 mm) deck, a 5 in difference. Deck width sets how much grass each pass covers. Mowing time also depends on ground speed, turns and obstacles, so a wider deck alone does not fix the job's length. Time both decks on your own lawn ›
- Liberty Z holds 3.5 gal (13.2 L) of fuel; 125VB holds 3 gal (11.4 L) of fuel, a 0.5 gal difference. Tank size bounds how long a machine runs between stops. Consumption varies with engine, load and speed, so hours per tank are not fixed.
what isn’t comparable
Not comparable
- Engine Power: not published for 125VB.
- Displacement: not published for Liberty Z.
- Ground Speed: not published for 125VB.
- Transmission: not published for Liberty Z.
- Fuel Type: not published for Liberty Z.
- Deck Construction: not published for 125VB.
- Drive System: not published for 125VB.
- Cut height range: not published for 125VB.
Verified means each manufacturer publishes the figure. A bigger number is only a bigger number; nothing here says which machine is better. The full specification table is below.
Which is faster on your property? › Measure your lawn once and MowerFacts times all 2 against it.
| Spec | Liberty Z Scag · Zero-Turn |
125VB Grasshopper · Zero-Turn |
|---|---|---|
| List price | $5,599–$7,399 | $8,760 |
| Engine | ||
| Power Source | gas | gas |
| Displacement | — | 44.2 ci (724 cc) |
| Engine Power | 18 hp | — |
| Engine Make | Kawasaki® FR Series | Briggs & Stratton |
| Fuel Type | — | Gasoline |
| Cylinders | — | 2 |
| Deck | ||
| Cutting Width | 36 in (914 mm) | 41 in (1041 mm) |
| Min Cut Height | 1.5 in (38 mm) | — |
| Max Cut Height | 4.5 in (114 mm) | — |
| Deck Construction | Dual-plate cutter deck constructed of 2 steel plates. Reinforcement plate at cutter deck spindles. | — |
| Drive | ||
| Transmission | — | Parker HTE Transmission |
| Ground Speed | 7 mph | — |
| Drive Tire Size | 20″ x 8″-10″ (36″)20″ x 10″-8″ (42″, 48″ and 52″)20″ x 10″-10″ (61″) | — |
| Reverse Speed | 5 mph | — |
| Drive System | 36″ and 42″ models: Hydro-Gear ZT-2800 Transaxle48″, 52″ and 61″ models: Tuff Torq TZ450 Transaxle | — |
| Dimensions | ||
| Weight | 555 lbs (251.7 kg) | 700 lbs (317.5 kg) |
| Fuel Capacity | 3.5 gal (13.2 L) | 3 gal (11.4 L) |
| Commercial / Pro | ||
| Seat Type | Padded with arm rests, adjustment forward and back (tools required)(no armrests on 36″ and 42″ models) | — |
Where these models differ, explained
Liberty Z: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — scag.com.
125VB: Specs verified against the retailer listing on Jun 8, 2026 — belcherspower.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.