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Ariens Classic LM 21 - User Manual

Ariens Classic LM 21
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Owner/Operator Manual
Manuel Du Propriétaire/Utilisateur
04502200 2/12
Printed in USA
ENGLISH
FRANÇAIS
Gasoline containing up to 10% ethanol (E10) or up to 10% MTBE (methyl tertiary butyl ether) is acceptable
for use in this machine.
The use of any gasoline exceeding 10% ethanol (E10) or 10% MTBE will void the product warranty.
Il est possible d’utiliser de l’essence contenant jusqu’à 10% d’éthanol (E10) ou 10% de MTBE (éther
méthyl-tertiobutylique) sur cette machine.
L’utilisation d’une essence contenant plus de 10% d’éthanol (E10) ou de 10% de MTBE annulent la
garantie.
Models
911170 – LM21 Classic
911192 – LM21 Classic
911193 – LM21S Classic
911194 – LM21SW Classic
Walk Behind Lawn Mower

Table of Contents

Other manuals for Ariens Classic LM 21

Preview: Illustrated Parts List
Illustrated Parts List5 pages

Questions and Answers

  • R
    Russell BrownJul 31, 2025
    Why Ariens Lawn Mower engine will not start?
    • D
      Dana JohnsonJul 31, 2025
      The Ariens Lawn Mower engine might fail to start due to several reasons: * The fuel tank may be empty or have a low fuel level. Check the fuel level and fill the tank if needed. * The spark plug wire could be loose or disconnected. Ensure it's properly connected. * The engine/blade control cable might be detached, broken, or improperly adjusted. Inspect the cable and adjust, repair, or replace it as necessary.
  • P
    Patricia RollinsAug 6, 2025
    What to do if Ariens Lawn Mower cut is poor?
    • J
      Jonathan KingAug 6, 2025
      If the cut quality from your Ariens Lawn Mower is poor, consider the following: * A worn blade could be the culprit. Check the blade. * Taking off too much grass at once can cause a poor cut. Try raising the cutting height. * Wet grass can also affect cut quality. Allow the grass to dry before mowing. * Mowing too fast might not give the blade enough time to cut cleanly. Reduce your mowing speed.
  • A
    April CarrAug 12, 2025
    Why Ariens Classic LM 21 grass does not disperse evenly?
    • A
      April AlexanderAug 12, 2025
      Uneven grass dispersal with your Ariens Lawn Mower can occur due to: * Removing too much grass per cutting. Try raising the cutting height. * Cutting grass when it's too wet. Allow the grass to dry before mowing. * Mowing at a speed that's too fast. Reduce your mowing speed to allow for even dispersal.
  • W
    Whitney RamirezAug 18, 2025
    What to do if Ariens Classic LM 21 Lawn Mower does not bag clippings?
    • B
      Brandy HernandezAug 18, 2025
      If your Ariens Lawn Mower isn't bagging clippings, it could be because: * The grass bag is overfilled. Empty the grass bag regularly and avoid overfilling it. * The mulching plug is installed. Remove the mulching plug if you want to bag clippings.
  • G
    gonzalezkevinAug 25, 2025
    How to fix Ariens Classic LM 21 Lawn Mower when engine is difficult to restart?
    • M
      Mark WrightAug 25, 2025
      If your Ariens Lawn Mower engine is hard to restart, it might be due to the mower being clogged with grass. Clear any clippings from under the mower. It's also helpful to allow the mower to clear clippings before shutting off the engine.

Summary

INTRODUCTION

THE MANUAL

Guide to reading manuals for safety instructions and understanding controls.

ENGINE MANUAL

Reference to the separate manual for engine-specific service recommendations.

SERVICE AND REPLACEMENT PARTS

Guidance on identifying model/serial numbers for parts and service inquiries.

DEALER DELIVERY

PRODUCT REGISTRATION

UNAUTHORIZED REPLACEMENT PARTS

DISCLAIMER

SAFETY

SAFETY ALERTS

Explanation of safety alert symbols, signal words, and their meanings.

PRACTICES AND LAWS

Adherence to safe working practices, awareness of conditions, and local laws.

REQUIRED OPERATOR TRAINING

Necessity of providing the manual and training to any new unit operator.

SAFETY DECALS AND LOCATIONS

DANGER AND CAUTION MESSAGES

Explains critical safety messages and warnings for operation and their locations.

EMISSION CONTROL SYSTEM

Information on emission controls and compliance with EPA and CARB regulations.

OPERATIONAL SAFETY RULES

Rules for safe operation, including sharing the manual and age restrictions.

ASSEMBLY

CARTON CONTENTS

Lists the components included in the mower's shipping carton.

ASSEMBLY STEPS

Step-by-step instructions for assembling the lawn mower unit.

CONTROLS AND FEATURES

CONTROL IDENTIFICATION

Visual identification and numbering of the mower's various controls and features.

HANDLEBAR ADJUSTMENT

Instructions on how to adjust, fold, and secure the handlebars.

OPERATION

CONTROLS AND FEATURES OVERVIEW

Explanation of key controls like engine/blade control, handlebar, and starter.

CUTTING HEIGHT ADJUSTMENT

Instructions for adjusting the cutting height levers for desired grass length.

MAINTENANCE

MAINTENANCE SCHEDULE

A schedule outlining service tasks like checks, cleaning, and changes at intervals.

CHECK ENGINE;BLADE CONTROL

Specific check for engine/blade control functionality and stopping time.

SERVICE AND ADJUSTMENTS

SERVICE POSITION

Method to place the unit for easier access to the underside of the deck.

DRIVE BELT REPLACEMENT

Detailed steps for removing and reinstalling the drive belt on self-propelled models.

HANDLEBAR HEIGHT

Instructions for adjusting the handlebar height and folding for storage.

STORAGE

CLEANING AND INSPECTION

Procedures for cleaning, inspecting, and preparing the mower for storage.

FUEL SYSTEM PREPARATION

Steps to treat the fuel system with stabilizer for extended storage.

TROUBLESHOOTING

COMMON PROBLEMS AND SOLUTIONS

A guide to identify and correct common issues like starting problems or poor cut.

SERVICE PARTS

SPECIFICATIONS

CONSUMER LIMITED WARRANTY

WARRANTY COVERAGE DETAILS

Information on warranty periods, product groups, and special extensions.

CUSTOMER RESPONSIBILITIES

Owner's responsibilities for registration and performing maintenance for warranty.

EMISSION CONTROL WARRANTY

EVAPORATIVE EMISSION CONTROL SYSTEM WARRANTY

Details warranty rights and obligations for the evaporative emission control system.

Ariens Classic LM 21 Specifications

General IconGeneral
Cutting Width21 inches
Drive TypePush
Deck MaterialSteel
Starting SystemRecoil
Engine Type4-cycle
Wheel Size8 inches (front)
Warranty2 years

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