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A neutral, side-by-side reference of each model's stated specifications. MowerFacts does not rank one model above another — 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 SFC-30 — commercial: daily paid use and high acreage; 30-inch deck; gas powered
- Scag SFC-21 — commercial: daily paid use and high acreage; 21-inch deck; gas powered
| Spec | SFC-30 Scag · Push / Walk-Behind |
SFC-21 Scag · Push / Walk-Behind |
|---|---|---|
| Engine | ||
| Power Source | gas | gas |
| Displacement | 13.7 ci (224 cc) | 9.9 ci (163 cc) |
| Engine Power | 7 hp | 4 hp |
| Cylinders | — | 1 |
| Engine Make | Kohler® Command PRO® CV224 | Honda |
| Deck | ||
| Cutting Width | 30 in (762 mm) | 21 in (533 mm) |
| Min Cut Height | 1.5 in (38 mm) | 1.5 in (38 mm) |
| Max Cut Height | 5 in (127 mm) | 4.5 in (114 mm) |
| Deck Construction | 14-gauge, grade 100, Military Grade steel deck shell with 12-gauge spindle reinforcement plate. ¼” trim side reinforcement bar offers extra protection against impacts. | 14 gauge deck with 14-gauge replaceable guards for strength and longevity. Deep draw stamped. |
| Drive | ||
| Drive System | GT MV 702 Transmission | — |
| Transmission | — | GT MG 512 transmission, 3-speed |
| Ground Speed | 4 mph | 4.2 mph |
| Dimensions | ||
| Weight | 220 lbs (99.8 kg) | 136 lbs (61.7 kg) |
| Fuel Capacity | 1 gal (3.8 L) | 0.4 gal (1.4 L) |
SFC-30: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — scag.com.
SFC-21: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — scag.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.