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.
- Ferris FW15 Walk Behind Mower — commercial: daily paid use and high acreage; 32-inch deck; gas powered
- Scag SW Belt-Drive — commercial: daily paid use and high acreage; 32-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- FW15 Walk Behind Mower holds 1 gal (3.8 L) of fuel; SW Belt-Drive holds 5.5 gal (20.8 L) of fuel, a 4.5 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.
- FW15 Walk Behind Mower uses a Honda® GXV390 engine; SW Belt-Drive uses a Kawasaki® FS Series 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.
- FW15 Walk Behind Mower weighs 285 lbs (129.3 kg); SW Belt-Drive weighs 450 lbs (204.1 kg), a 165 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What FW15 Walk Behind Mower's weight means for a trailer ›
- FW15 Walk Behind Mower has a published top speed of 4 mph; SW Belt-Drive has a published top speed of 6 mph, a 2 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- FW15 Walk Behind Mower has a 10.2 hp engine; SW Belt-Drive has a 14 hp engine, a 3.8 hp difference. Published horsepower is the maker's rating at a stated engine speed. It is a different measure from displacement, and two engines of equal rating can pull differently.
2 more differences, calculated figures and what isn’t comparable
Other verified differences
- FW15 Walk Behind Mower lists at $4,343; SW Belt-Drive lists at $5,349 to $6,499, a $1,006 difference.
- FW15 Walk Behind Mower cuts from 1.5 in (38 mm) to 5 in (127 mm); SW Belt-Drive cuts from 1.7 in (44 mm) to 4.5 in (114 mm).
Calculated by MowerFacts
- FW15 Walk Behind Mower works out to 1.0 acres/hour; SW Belt-Drive works out to 1.6 acres/hour, a 0.5 acres/hour difference. Calculated by MowerFacts from deck width and the published top speed at 80% efficiency; it is not a manufacturer figure, and real mowing is slower.
Not comparable
- Displacement: not published for SW Belt-Drive.
- Warranty: not published for SW Belt-Drive.
- Transmission: not published for SW Belt-Drive.
- Fuel Type: not published for SW Belt-Drive.
- Deck Material: not published for SW Belt-Drive.
- Drive System: not published for FW15 Walk Behind Mower.
- Start Type: not published for SW Belt-Drive.
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 | FW15 Walk Behind Mower Ferris · Push / Walk-Behind |
SW Belt-Drive Scag · Push / Walk-Behind |
|---|---|---|
| List price | $4,343 | $5,349–$6,499 |
| Engine | ||
| Power Source | gas | gas |
| Displacement | 23.7 ci (389 cc) | — |
| Engine Power | 10.2 hp | 14 hp |
| Cylinders | 1 | — |
| Start Type | Manual | — |
| Fuel Type | Gas | — |
| Engine Make | Honda® GXV390 | Kawasaki® FS Series |
| Deck | ||
| Cutting Width | 32 in (813 mm) | 32 in (813 mm) |
| Min Cut Height | 1.5 in (38 mm) | 1.7 in (44 mm) |
| Max Cut Height | 5 in (127 mm) | 4.5 in (114 mm) |
| Deck Material | 14 and 12-gauge Fabricated | — |
| Deck Construction | 14 and 12-gauge Fabricated | Dual-plate cutter deck constructed of 2 steel plates. Reinforcement plate at cutter deck spindles. |
| Deck Gauge | 12 | — |
| Drive | ||
| Drive Tire Size | — | 13″ x 5″-6″ (32″)13″ x 6.5″-6″ (36″, 48″ and 52″) |
| Ground Speed | 4 mph | 6 mph |
| Transmission | Peerless axle with differential chain driven by Hydro-Gear® RT-310 pump and motor | — |
| Reverse Speed | 2 mph | 2 mph |
| Drive System | — | Belt Drive with 5-Speed Peerless Transmission |
| Dimensions | ||
| Weight | 285 lbs (129.3 kg) | 450 lbs (204.1 kg) |
| Fuel Capacity | 1 gal (3.8 L) | 5.5 gal (20.8 L) |
| Length | 73.5 in (1867 mm) | — |
| Commercial / Pro | ||
| Seat Type | — | n/a |
| General | ||
| Warranty | 2 yr | — |
FW15 Walk Behind Mower: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — ferrismowers.com.
SW Belt-Drive: Specs verified against the manufacturer spec sheet on Jun 7, 2026 — scag.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.