Exmark Lazer Z X-Series (LRX 72 in 921) vs Ferris ISX 3300 Zero Turn Mowers (72 in / 5902145)
A neutral, side-by-side spec reference for two commercial machines. MowerFacts does not crown a winner — the tables lay out each model's stated specs so you can match a machine to your property and routes.
A side-by-side for the commercial mower Exmark Lazer Z X-Series (LRX 72 in 921) and the zero-turn mower Ferris ISX 3300 Zero Turn Mowers (72 in / 5902145). Open the full spec table in the compare tool ›
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.
- Exmark Lazer Z X-Series (LRX 72 in 921) — commercial: daily paid use and high acreage; 72-inch deck
- Ferris ISX 3300 Zero Turn Mowers (72 in / 5902145) — commercial: daily paid use and high acreage; 72-inch deck
Productivity
| Measure | Lazer Z X-Series (LRX 72 in 921) | ISX 3300 Zero Turn Mowers (72 in / 5902145) |
|---|---|---|
| Cutting deck | 72 in | 72 in |
| Ground speed | 11.5 mph | 12 mph |
| Acres/hr (80%) | 6.69 | 6.98 |
| Acres/hr (100%) | 8.36 | 8.73 |
Acres/hour computed from deck width and ground speed; 80% accounts for turns, overlap and trimming. Calculator ›
Components
| Component | Lazer Z X-Series (LRX 72 in 921) | ISX 3300 Zero Turn Mowers (72 in / 5902145) |
|---|---|---|
| Engine make | Kawasaki FX921V | Vanguard® BIG BLOCK™ EFI ETC with Oil Guard |
| Displacement | 999 cc | 993 cc |
| Engine power | 31 hp | 40 hp |
| Transmission | not specified by manufacturer | Dual commercial Hydro-Gear® ZT-5400 Powertrain® Transaxles with 9" cooling fans |
| Drive type | not specified by manufacturer | not specified by manufacturer |
Ownership & dimensions
| Spec | Lazer Z X-Series (LRX 72 in 921) | ISX 3300 Zero Turn Mowers (72 in / 5902145) |
|---|---|---|
| Weight | 591.48 kg | 778.82 kg |
| Fuel capacity | 45.42 L | 41.64 L |
| Warranty | not specified by manufacturer | 2 |
| Dimensions (L×W×H mm) | 2187 × 2156 × 1791 | 2146 × not specified by manufacturer × not specified by manufacturer |
Dealer network and dimensions not in our data are shown as "not specified by manufacturer." See the full spec sheet on each model page.
Alternatives to cross-shop
FAQ
Is the Exmark Lazer Z X-Series (LRX 72 in 921) or the Ferris ISX 3300 Zero Turn Mowers (72 in / 5902145) better?
MowerFacts is a spec reference, not a review — we don't crown a winner. The Exmark Lazer Z X-Series (LRX 72 in 921) and Ferris ISX 3300 Zero Turn Mowers (72 in / 5902145) are both commercial machines with their own deck widths, engines and dimensions; the tables below lay out each spec side by side so you can match a machine to your property and routes.
How many acres per hour can the Exmark Lazer Z X-Series (LRX 72 in 921) and Ferris ISX 3300 Zero Turn Mowers (72 in / 5902145) mow?
At 80% efficiency the Exmark Lazer Z X-Series (LRX 72 in 921) (72-in deck at 11.5 mph) covers about 6.69 acres/hour and the Ferris ISX 3300 Zero Turn Mowers (72 in / 5902145) (72-in deck at 12 mph) about 6.98 acres/hour, before trimming and trailering time.
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Lazer Z X-Series (LRX 72 in 921): Specs verified against the retailer listing on Jun 6, 2026 — altmantractor.com.
ISX 3300 Zero Turn Mowers (72 in / 5902145): Specs verified against the manufacturer spec sheet on Jun 6, 2026 — ferrismowers.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.