2026 Grasshopper 337G5 EFI 72 in

Equipped with EFI engines that provide reliable hot and cold weather starts, reduced engine exhaust emissions, fewer fuel-related service issues, and more.

EFI engines.
300G MidMount zero-turn riding lawn mowers feature robust, efficient EFI engines that minimize fuel-related service issues, reduce emissions, and offer powerful performance.

EFI technology
Delphi®-based closed-loop electronic fuel injection continually adjusts fuel ratio to use less fuel and provide reliable hot and cold starts, reduced exhaust emissions, and fewer fuel-related service issues.

Commercial-grade durability.
Featuring either V-twin B&S Vanguard® OHV gasoline engines with vertical crankshaft and pressure lube or a V-twin Kawasaki® gasoline engine, the 300G series mowers are designed to provide efficient power and extend service life.

Simplified service.
Engine models feature automotive-style plug-in diagnostics and facilitate faster, more precise service.

Design-matched G4/G5 transmission.
Design-matched Hydro-Gear® tansmissions bring smooth, responsive, all-pro performance to the 300G zero-turn MidMount™ mowers.

Robust, design-matched components.
Hydro-Gear® ZT4400 and ZT5400 transmissions are design-matched to the mower, feature self-contained, heavy-duty transaxles, and are engineered to transmit more power to the cutting deck.

Extended service life.
Integrated cooling fans and 1-3/8-inch axles extend service life, while the overall design of both drive systems provides best-in-class transmission fluid change intervals.

Nothing compares to a DuraMax Deck.
We didn't settle for flimsy, stamped steel decks. We spent years building the toughest, most durable deck around.

All-steel design.
All of our mower decks are made from the same robotically welded, heavy-gauge, formed steel and are far superior to the flimsy plastic or stamped-steel construction you find elsewhere.

Enhanced airflow.
Our extra deep, 5.5-inch DuraMax® decks are made from years of innovative airflow research and feature specially-designed cutting chambers that deliver enhanced airflow for a better cut quality.

Anvil-edged construction.
Plus, an extra layer of heavy-gauged formed steel sits over the deck’s leading edge for greater overall durability and impact protection.

Massive 8-inch spindle flanges.
Spindles are anchored to double layers of robotically-welded, formed steel in a 6-bolt pattern to spread the force of impact for greater strength in commercial applications. Triple-strength decks are nearly 1-inch thick in stress zones with durable Sentry™ spindles mounted on spindle planes that are more than 25% thicker than 1/4 inch. Spindle guards shield the housing and seal lower bearings from grass wrap and dirt ingestion. High-impact, high-rotational-speed bearings with durable seals extend spindle life.

Adjustable discharge options.
Designed to let you change the way you mow without changing decks, Grasshopper decks let you easily convert between standard Side-Discharge, Down-Discharge Mulching, and PowerVac Collection.

Topside access.
Easily reach belts and grease points, plus make quick, simple work out of your routine zero-turn mower maintenance.

Features May Include: 

MARBAIN® Cutting Blades

• MARBAIN® cutting blades are 1/4-inch thick and are through-hardened to hold their edge longer, delivering a better cut and twice the life of aftermarket blades.

Ultimate Operator Station

• The Grasshopper Ultimate Operator Station™ is centered around a deep-cushioned seat featuring coil-spring suspension and padded lumbar support. The seat is iso-mounted to reduce vibration and covered in cool, comfortable Cordura® fabric that won't tear or crack with extended use.
• It also features easy-to-reach operational controls, including the throttle, ignition, and push/pull PTO switch. Plus, QuikAjust Tilt™ dual levers with a 9-inch adjustment range allows for a more custom fit and will automatically return to neutral from either forward or reverse.

Low Center Of Gravity

• 300G models have a single-fill fuel tank mounted beneath the seat, lowering the center of gravity and allowing the machine more traction and stability.

Steel Build

• A robotically welded, high-grade US steel frame and formed steel I-beam reinforcement, combined with the all-steel DuraMax deck, prove that we put metal where it matters—everywhere.

ROPS

• All 300G Series mowers come standard with a low-profile Roll Over Protection System (ROPS) and adjustable seatbelt for safe operation.

QuikAjust Tilt™ Dual Levers

• QuikAjust Tilt™ steering levers offer a 9-inch range of adjustment for a more custom, comfortable operator experience. No tools needed.

Hydraulically Dampened Control Levers

• The hydraulically dampened control levers deliver a smooth, responsive ride and return to neutral when released from both forward and reverse.

DropPin Height Adjustment

• DropPin™ Height Adjustment makes cutting height changes fast and simple by using a foot pedal and drop pin to raise and lower the deck between 1 and 5 inches.

Reduced Maintenance

• 300G Series mowers have only two Access-Eze™ lubrication points, which cut maintenance time down by up to 95%. Additionally, self-tensioning belts minimize costs and labor associated with routine maintenance.

Superior Warranty

• Commercial Use: 328G4 has a 3-year or 1,000-hour (whichever comes first); limited warranty: First two years covering parts and labor, last year covering parts only.
• 337G5 has a 3-year or 1,250-hour (whichever comes first); limited warranty: First two years covering parts and labor, last year covering parts only.
• Residential Use: 4-year or 800-hour (whichever comes first); limited warranty: First two years covering parts and labor, last two years covering parts only.

Featured Add-Ons:

Premier Suspension Seat

• Fully adjustable operator seat is iso-mounted to reduce vibrations, has padded lumbar support, and is covered in breathable Cordura® fabric that won't tear or crack.

Foldable ROPS

• Fold-down roll bar allows you to easily store the mower and load it onto low-clearance trailers.

Aluminum Sunshade Canopy

• Made from diamond-plated aluminum, this canopy mounts to the ROPS for added sun protection and all-day comfort.

Foot-Riser Platform

• Footrest addition raises the platform an extra 2 inches once installed to provide a more comfortable ride for smaller operators.