Model#: ARNN911193

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Ariens LM21S Classic Series 179cc Gas 21 in. 3-in-1 Self-Propelled Walk Behind Lawn Mower

  • Ariens LM21S Classic Series 179cc Gas 21 in. 3-in-1 Self-Propelled Walk Behind Lawn Mower
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Ariens' Classic Series lawn mowers deliver the classic cutting power and performance expected from the Ariens brand. With a high performance Kawasaka FJ180V 179cc engine, the LM21S makes quick work of mid-sized lawns with its 21 in. wide cutting path. A durable stamped steel deck and high lift blade system are highly resistant to wear, and provide maximum cutting and clipping collection efficiency. With the convenient Infi-Speed variable-speed control system, the LM21S is easy to control and maneuver over various levels of terrain, making it the ideal mower for homeowners looking for an easy to use yet powerful mower.
  • Reliable Kawasaka FJ180V 179cc engine delivers high-performance cutting power.
  • 21 in. wide cutting path ideal for mid-sized and larger lawns
  • 3-in-1 cutting system includes rear discharge, side discharge and mulching capabilities
  • Infi-Speed variable-speed control increase ease of operation and control over terrain
  • Durable 14-Gauge stamped steel deck resists wear and damage
  • Straight axle design offers improved control with straight mowing paths (swivel wheel kit sold separately)
  • High lift blades maximum bagging efficiency
  • Six position cutting height adjustment ranging from 1 in. to 3-1/4 in
  • Classic Series 179cc Gas 21 in. 3-in-1 Self-Propelled Walk Behind Lawn Mower - 911193
  • Rear Collection Bag
  • Mulch Plug
  • Side Discharge Chute


Series: Classic
Length: 61.5 in.
Width: 23 in.
Height: 38 in.
Weight: 109 lbs.
Cutting Height (Max.): 3-1/4 in.
Cutting Height (Min.): 1 in.
Cutting Height Settings: 6
Cutting Path: 21 in.
Deck Material: Steel
Discharge Settings: Side / Rear
Drive System: Self-Propelled
Engine Displacement: 179cc
Engine Make: Kawasaki
Engine Model: FJ180V
Fuel Tank Capacity: 0.53 gal.
Mulching Capability: Yes
Starting System: Recoil



4.5 / 5.0
21 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Excellent mower
I purchased this mower about three years ago to replace a similar unit which had a B & S engine. The Kawasaki engine has more then enough power for any mowing need. Tall grass, wet grass, nothing slows it up. Starts with one pull every time. Cold weather however, it takes a couple of pulls. The mower is a little heavier then others I've owned but is still easy to maneuver around trees and other obstacles. I also use it in the Fall to pick up leaves and general yard cleaning. I would recommend this mower to anyone.
October 23, 2016
Originally posted at
Just bought the Ariens Classic Series 179CC mower
This is my 3rd Ariens lawm mower in the past 25 years The last two were the LM21S KAWI 6.0. Ariens makes a great mower. The only problem I had was the front wheel adjusting brackets broke, I ended up fixing them myself. The mowers worked great, they made the yard look super. I'm hoping this new Ariens mower is as good as the last two. I bought the Ariens Classic 179CC 21 inch. I'm going to have to wait for the snow to melt before I can give it a try.
December 9, 2016
Originally posted at
I only push a Ariens around my lawn.
In 40 years I have had 3 LS21's. This should be my last one.
June 13, 2013
Originally posted at
Had this same model for over twenty years.
I have owned mine for over twenty years... I had not had to do one thing to the drive train. No new belts, no new blades. It just keeps rolling. After about 15 years I updated the engine. Did it myself. My best friend bought a John Deer the same day. his was trash after about five years. Send me a NEW one and I'll grade it against my old one, and give you tips.
June 23, 2017
Originally posted at
Very easy to handle
This mower is a workhorse. I have been mowing twice a week and have had great results. The mower always starts on the first try. My wife can
use this machine with ease. Very good product.
June 14, 2012
Originally posted at
Classic LM 21 S
Great machine I would not own any other Brand, only draw back is it is slightly heavier then the Model before other than that Just Great.
June 13, 2013
Originally posted at
Great Mower
Second ariens mower last one went 15 years, only mower that vacuums like an ariens!
June 13, 2013
Originally posted at
Great machine my 2nd one
Very durable machine we mow 20 yards per day both machine operate as good as the day I bought them one 2 years ago the other this year considering purchasing the 3rd one. Variable,speed transmission is awesome easy to adjust Easy to start even in cold weather
June 13, 2013
Originally posted at
What I wanted!
Works the balls! Tilled a new garden out of tough grass and soil in no time!
June 13, 2013
Originally posted at
Excellent design
This is my second Ariens with turning wheels ! Last one went 16 yrs with minimal repair. the new has only one flaw....the throttle or speed control wont hold a setting it always falls back to a slower speed...a real pain but hey its a great mower....all my neighbors are envious of the way it turns ! I waxed it so its shines like the sun !
June 13, 2013
Originally posted at

Questions & Answers

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Browse 2 questions Browse 2 questions and 2 answers
Is this the mower with 2 big wheels on back of mower?
A shopper on Feb 15, 2017
BEST ANSWER: The rear wheels on this mower are 10.5 inches.
is this mower shipped free ?
Mike on Mar 31, 2015
BEST ANSWER: Due to the size and weight of the mower, that unit cannot take advantage of the free "economy" shipping. The 911193 would incur a freight charge, various shipping options will be available at checkout.