Mouseover to Zoom

Commercial 21 S-Series

“S” as in Simple.
They say simplicity is the basis of great engineering. And it doesn’t get much simpler than the Exmark® Commercial 21 S-Series, beginning with its patented front height adjustment. This straightforward design makes conventional pivot-style adjusters obsolete. There are zero grease points and less than half the parts of other mowers in its class. That makes servicing the S-Series almost as easy as it gets. Then there’s the single-speed transmission, simplified bail system, single-point rear height adjust, the innovative blade design that makes it easy to go from mulching to bagging the list goes on and on. Just like the mower.

Available Models

Multi-Purpose Blade

Variable-Speed Transmission

The Exmark Signature Cut

Easy On/Off Bag Design

Patented Front Height Adjustment

Bag Capacity

Model Specs

Specifications for model # ECS180GKA21000

Drive Tires 9" x 2.5", semi-pneumatic.
Safety Package Zone start
Power Components
Engine Model FJ180V
Engine Brand Kawasaki®
Engine Series FJ
Engine Speed 3,300 rpm
Air Filter Dual element air cleaner
Drive Description Self-propelled; rear-wheel gear-driven.
Speed 0.0 mph to 4.2 mph (6.6 kmph) forward.
Fuel Capacity 2 quart integral fuel tank
Engine Type Carbureted
Engine Displacement 179
Drive Belt-Drive
Fuel Indicator None
Carb Compliant No
Fuel Type Gas Carbureted
Deck Style Fixed Deck
Deck Style Description Fixed deck, Rear -discharge bagger standard with option to mulch.
Width / Cutting Deck 21"
Deck Construction 5" deep, 1/4"-thick die-cast aluminum.
Cutting Heights 1.0" (2.5 cm) to 4.5" (11.4 cm) in 0.5" (1.3 cm) increments.
Blade Tip Speed Approximately 18,500 fpm.
Bag Capacity 2.5 bushels (20 gallons).
Blades 1 Blade at 20.5" Length
Width 22 in. (55.9 cm)
Length 62 in. (157.5 cm)
Height 38 in. (96.5 cm)
Curb Weight 112


Exmark Product Models: Parts Only

Coated Bail Drive

Part# 109-8442

Coated Bail OPC/BBC

Exmark Product Models: Parts Only

Door Handle Kit

Part# 109-9326


Exmark Product Thumbnail

9.5" Diameter Tire Kit

Part# 109-9328

For extended cut height, tough terrain, or when reduced rolling resistance is needed, this larger-diameter wheel kit improves your productivity.

Exmark Product Thumbnail

Deck Wear Kit

Part# 109-9329

Prolong the life of your deck in the toughest conditions with this heavy-duty deck wear kit.

Exmark Product Thumbnail

Wheel Weight Kit

Part# 109-9331

Enhance your productivity in wet conditions. Each wheel plate weighs 3 pounds to give you excellent performance, even with a full load of grass.

Exmark Product Thumbnail

One Gallon Gas Tank

Part# 109-9333

Maximize your mowing with increased fuel capacity. The 1-gallon gas tank fits easily onto your engine to provide optimum productivity. Available for ECSKA21 model.

Exmark Product Thumbnail

Mulch Plug

Part# 116-0251

Quick and easily transition from bagging to mulching by simply inserting the mulch plug in the discharge chute without the use of tools.

Exmark Product Thumbnail

Engine Guard

Part# 116-0522

Protect your engine from impact when mowing round low-hanging branches and other obstacles.

Exmark Product Models: Parts Only

Coated Bail Drive

Part# 116-7907

Coated Bail OPC/BBC




by PowerReviews
ExmarkCommercial 21 S-Series

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top

(2 of 9 customers found this review helpful)


A waste


from St. Louis

Comments about Exmark Commercial 21 S-Series:

The rattiest cut I have ever seen in a professional mower. The problem has to be the blade. My 12 year old Honda is a much better machine.

Comment on this reviewHelp Icon