Commercial 21 S-Series Walk-Behind Mower
Commercial 21 S-Series Walk-Behind Mower

“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.

Model Specs for Commercial 21 S-SERIES (#ECS180GKA21000)
Drive Tires: 9" x 2.5", semi-pneumatic.
Safety Package: Zone start
Power Components
Engine: 179 cc Kawasaki® FJ180V
Fuel Type: Gas
Fuel Capacity: 2 qt
Drive: Belt-Drive
Air Filter: Dual element air cleaner
Deck Style: Fixed Deck
Bag Capacity: 20 gal
Deck Construction: 5" deep, ¼"-thick die-cast aluminum
Cutting Width: 21"
Blade: 1 Blade at 20.5" Length
Blade Tip Speed: Approximately 18,500 fpm
Width: 22"
Length: 62"
Height: 38"
Curb Weight: 112 lbs
Image Gallery
  • Commercial 21S
  • Commercial 21S
Outstanding Features

Variable-Speed Transmission
Variable-Speed Transmission
Just engage and go, at infinitely variable speeds up to 4.2 mph. Its simple operation makes the S-Series a great mower for training new employees.


The Exmark Signature Cut
The Exmark Signature Cut
The cutting deck is a full five inches deep, delivering a consistently great cut whether you’re bagging or mulching.


Easy On/Off Bag Design
Easy On/Off Bag Design
Easy on/off bag design eliminates the need for levers and doors. The top fill feature allows the operator to check how full the bag is during operation.