Grasshopper 328G4 EFI
Zero-Turn mower · Model 328G4 EFI · Commercial-duty · Gas
$15,195 Grasshopper list price
Manufacturer list price only — it excludes tax, freight, dealer setup and any local discount, and dealers set the final price.
- Weighs 1,140 lb
- On a 6×12 trailer 2,040 lb towed, single-axle 3,500 lb
- Mows an acre in 19 min (14 at top speed) How long for your yard? ›
- How these are worked out ›
The Grasshopper 328G4 EFI is a commercial-grade gas zero-turn mower, built for daily commercial mowing, with a 52-inch deck and a 810cc engine making 28 hp. It weighs 1140 lb (517.1 kg).
At a glance
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
Chosen by stated rules, not opinion: same class, a deck within 6 in of this one, the same kind of power and a compatible duty class, then the closest power, weight and price, with other makers preferred. Figures are the manufacturers’ published ones; nothing is estimated.
Engine
| Power Source | gas |
|---|---|
| Displacement | 49.4 ci (810 cc) |
| Engine Power | 28 hp |
| Engine Make | Vanguard |
| Cylinders | 2 |
| Fuel Type | Gasoline |
Deck
| Cutting Width | 52 in (1321 mm) |
|---|---|
| Deck Material | Double-layered 10-gauge plus 7-gauge formed-steel |
| Deck Gauge | 10 |
Drive
| Transmission | Hydro-Gear ZT-4400 Transmission |
|---|---|
| Ground Speed | 10.5 mph |
Dimensions
| Weight | 1140 lbs (517.1 kg) |
|---|---|
| Fuel Capacity | 13 gal (49.2 L) |
Professional use
How the 328G4 EFI fits commercial and high-acreage work, from the specs we have. Duty class: Commercial.
Productivity computed from deck width and ground speed. Compare on the calculator ›
| Deck width | 52 in |
|---|---|
| Engine make | Vanguard |
| Engine displacement | 810 cc |
| Engine power | 28 hp |
| Transmission | Hydro-Gear ZT-4400 Transmission |
| Ground speed | 10.5 mph |
| Fuel capacity | 49.2 L |
| Weight | 517.1 kg |
| Deck construction | Double-layered 10-gauge plus 7-gauge formed-steel |
| Deck gauge | 10 ga |
Grasshopper doesn’t publish 9 of these for the 328G4 EFI: drive type, cut-height range, warranty, commercial warranty, spindle type, frame construction, anti-scalp rollers, drive tire size, seat type.
See the Grasshopper commercial pro hub › · Professional buying hub ›
Similar models
Other zero-turn mowers with comparable specs — including other brands — that buyers cross-shop with the 328G4 EFI.
Specs verified against the manufacturer spec sheet on Jun 6, 2026 — grasshoppermower.com.
See every mower with a Vanguard engine ›
What the parts on this spec sheet mean
Other Grasshopper 300G Series models › 2 more in this range: 334.5-G4 KW EFI/ETC, 337G5 EFI/ETC
See all Grasshopper mowers and specs ›
Spot a wrong spec? Suggest a correction.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
What the specs work out to
Figures MowerFacts computes from Grasshopper’s own numbers — not published by the manufacturer.
Mowing time
- ¼ acre5 min 3 min
- ½ acre10 min 7 min
- 1 acre19 min 14 min
- 2 acres39 min 27 min
- 5 acres1 h 37 min 1 h 8 min
- 10 acres3 h 14 min 2 h 16 min
About 19 min per acre at 3.09 acres/hour, mowing at 7.3 mph. The second figure is at the published 10.5 mph top speed (4.41 acres/hour) — faster than anyone really mows. About 40.2 acres per tank.
Weight & hauling
- Machine weight1,140 lb
- + 6×12 trailer900 lb
- Towed weight2,040 lb
- single-axle 3,500 lbCarries it, 1,460 lb spare
- tandem-axle 7,000 lbCarries it, 4,960 lb spare
Needs a single-axle 3,500 lb trailer and a vehicle rated to tow at least 2,040 lb.
Gate & trailer fit
- 32 in gateToo wide
- 36 in gateToo wide
- 48 in gateToo wide
Needs at least 59 in of clearance (estimated).
Power & run time
- Power per deck inch0.538 hp/in
- Run time per tank~13.0 h
Mowing times assume 3.09 acres/hour: deck width x 7.3 mph at 80% efficiency, which allows for overlap, turns and trimming. 7.3 mph is 70% of the 10.5 mph top speed Grasshopper publishes - almost nobody mows flat out. The "at top speed" figure is the same sum at 10.5 mph, shown so you can see it.
Fit uses the deck width plus 6 in for the discharge chute, because Grasshopper doesn't publish an overall width — measure before buying if a gate is tight.
Towed weight adds a 900 lb allowance for a 6x12 open utility trailer to Grasshopper's published machine weight. Your trailer's own weight is on its VIN plate. Tongue weight, axle placement and your vehicle's tow rating are still yours to check — this is the load, not a loading plan.
Run time assumes a typical 1 gal/hour burn at working load; real consumption varies with engine, load and cut.
Grasshopper 328G4 EFI questions
What size deck is on the Grasshopper 328G4 EFI?
The Grasshopper 328G4 EFI has a 52-inch (1321 mm) cutting deck with double-layered 10-gauge plus 7-gauge formed-steel construction.
What engine is in the Grasshopper 328G4 EFI?
The Grasshopper 328G4 EFI is powered by a Vanguard, 810 cc, 28 hp. Horsepower is the manufacturer's own rating.
How much does the Grasshopper 328G4 EFI weigh?
The Grasshopper 328G4 EFI weighs 1,140 lb (517.1 kg) as specified by Grasshopper.
What size trailer do I need for the Grasshopper 328G4 EFI?
At 1,140 lb, the Grasshopper 328G4 EFI on a typical 6x12 open utility trailer (about 900 lb empty) is roughly 2,040 lb of towed weight. That is within a single-axle 3,500 lb trailer, and your tow vehicle needs to be rated for at least 2,040 lb. Tongue weight, axle placement and your own trailer's empty weight still have to be checked — this is the arithmetic, not a loading plan.
How fast is the Grasshopper 328G4 EFI?
Top ground speed is 10.5 mph. With its 52-inch deck that works out to about 4.41 acres per hour at 80% efficiency — allowing for overlap, turns and trimming.
How long does the Grasshopper 328G4 EFI take to mow an acre?
About 14 min per acre, from its 52-inch deck at 10.5 mph and 80% efficiency — roughly 4.41 acres an hour, so five acres is about 1 h 8 min. Rough or obstacle-heavy ground takes longer; this is deck width times ground speed, not a timed test.
How big is the fuel tank on the Grasshopper 328G4 EFI?
The Grasshopper 328G4 EFI holds 13 gal (49.2 L) of fuel.
How much does the Grasshopper 328G4 EFI cost?
Grasshopper's published list price is $15,195, checked 22 October 2026. That excludes tax, freight, dealer setup and any local discount — dealers set the final price.
What is the Grasshopper 328G4 EFI built for?
Commercial-duty zero-turn mower. Built for daily, paid commercial use.
Source: Grasshopper (manufacturer) · archived copy