Ariens 911110 - SP 21LM User Manual
929.02 Kb

Walk Behind Lawn Mower

Owner/Operator Manual


911110 - SP 21LM

911111 - SSP 21LM

911112 - DSP 21LM

911113 - DESP21LM




Transfer model & serial number label from product registration here.

Coller l’autocollant du modèle et du numéro de série dans cet encadré.

Transferir aquí la etiqueta del modelo y número de serie del registro del producto.

01271200A 7/06 Printed in USA


Safety . . . . . . . . . . . . . . . . . . . . . . . . . .

. 3

Storage. . . . . . . . . . . . . . . . . . . . . . . . .


Assembly . . . . . . . . . . . . . . . . . . . . . . .

. 8

Troubleshooting . . . . . . . . . . . . . . . . .


Controls and Features . . . . . . . . . . . .


Service Parts . . . . . . . . . . . . . . . . . . . .


Operation . . . . . . . . . . . . . . . . . . . . . . .


Accessories . . . . . . . . . . . . . . . . . . . . .


Maintenance. . . . . . . . . . . . . . . . . . . . .


Specifications . . . . . . . . . . . . . . . . . . .


Service and Adjustments . . . . . . . . . .


Warranty. . . . . . . . . . . . . . . . . . . . . . . .




Before using the unit, carefully and completely read your manuals. The contents will give you an understanding of safety instructions and controls during normal operation and maintenance.

All reference to left, right, front, or rear are given from the operator’s position, facing the direction of forward travel.


When ordering replacement parts or making service inquiries, know the Model and Serial numbers of your unit and engine.

Numbers are located on the product registration form in the unit literature package. They are also printed on a serial number label, located on the frame of your unit (Figure 1).

• Record Engine Model & Serial numbers here:


The Ariens dealer must register the product at the time of purchase. Registering the product will help the company process warranty claims or contact you with the latest service information. All claims meeting requirements during the limited warranty period will be honored, whether or not the product registration card is returned. Keep a proof of purchase if you do not register your unit.

Customer Note: If the Dealer does not register your product, please fill out, sign and return the product registration card to Ariens or go to on the internet.

Engine Serial

Number Label

Unit Serial

Number Label

Figure 1

• Record Unit Model and Serial numbers here:


Use only Ariens replacement parts. Replacing any part on this vehicle with anything other than an Ariens authorized replacement part may adversely affect the performance, durability, or safety of this unit and may void the warranty. Ariens disclaims liability for any claims or damages, whether warranty, property damage, personal injury or death arising out of the use of unauthorized replacement parts. To locate your nearest Ariens Dealer, go to on the internet.


Dealer should:

1.Check that all assembly and adjustments have been properly completed.

2.Fill out Original Purchaser Registration Card and return the card to Ariens.

3.Explain Ariens Limited Warranty Policy.

GB - 2 © Copyright 2006 Ariens Company

4.Explain recommended lubrication and maintenance. Advise customer on adjustments. Remind customer to change oil in 4 cycle engine crankcase after first five (5) hours of operation.

5.Instruct customer on controls and operation of unit. Discuss and emphasize the Safety Rules. Give customer Owner/Operator, Parts, and Engine manuals. Advise customer to thoroughly read and understand them.


Ariens reserves the right to discontinue, make changes to, and add improvements upon its products at any time without public notice or obligation.The descriptions and specifications contained in this manual were in effect at printing. Equipment described within this manual may be optional. Some illustrations may not apply to your unit.


WARNING: This cutting machine is capable of amputating hands and feet and throwing objects. Failure to observe the safety instructions in the manuals and on decals could result in serious injury or death.

Slopes are a major factor related to slip and fall accidents. Operation on all slopes requires extra caution.

Tragic accidents can occur if the operator is not alert to the presence of children. Never assume that children will remain where you last saw them.

Gasoline is extremely flammable and the vapors are explosive, handle with care.

Stop unit and engine, remove key (if equipped) and allow moving parts to stop before leaving operator’s position.


Look for these symbols to point out important safety precautions. They mean:


Personal Safety Is Involved!

Become Alert!

Obey The Message!

The safety alert symbols above and signal words below are used on decals and in this manual.

Read and understand all safety messages.

DANGER: IMMINENTLY HAZARDOUS SITUATION! If not avoided, WILL RESULT in death or serious injury.

WARNING: POTENTIALLY HAZARDOUS SITUATION! If not avoided, COULD RESULT in death or serious injury.

CAUTION: POTENTIALLY HAZARDOUS SITUATION! If not avoided, MAY RESULT in minor or moderate injury. It may also be used to alert against unsafe practices.


NOTE: General reference information for proper operation and maintenance practices.

IMPORTANT: Specific procedures or information required to prevent damage to unit or attachment.


Practice usual and customary safe working precautions, for the benefit of yourself and others. Understand and follow all safety messages. Be alert to unsafe conditions and the possibility of minor, moderate, or serious injury or death. Learn applicable rules and laws in your area.



Original purchaser of this unit was instructed by the seller on safe and proper operation. If anyone other than the original purchaser will use the unit, ALWAYS provide this manual and any needed safety training before operation.

GB - 3



ALWAYS replace missing or damaged safety decals. Refer to Figure 2 for safety decal locations.







Figure 2




Read the operator’s manual.


Keep children and others away from unit while operating.



Never direct discharge toward other people. Thrown objects can cause injury.

Do not operate mower unless guards are in operating position or entire bagger is attached.



Keep safety devices (guards, shields, switches, etc.) in place and working.

Go across slopes, not up and down.

Look down and behind before and while moving backward.

Do not park on a slope unless chocked or blocked.

Do not allow operation of machine by untrained personnel.



Do not operate mower unless guards are in operating position or bagger is attached.


Bag is subject to wear and deterioration.

Check bag frequently, replace when necessary.

Use original bag to comply with safety specifications.


If unit is to be used by someone other than original purchaser; loaned, rented or sold, ALWAYS provide this manual and any needed safety training before operation.

Learn applicable rules and laws in your area, including those that may restrict the age of the operator.

Read, understand and follow all safety practices in Owner/Operator Manual before beginning assembly. Failure to follow instructions could result in personal injury and/or damage to unit.

GB - 4

If the operator or the mechanic cannot read the manual, it is the owner’s responsibility to explain it to them. Only the user can prevent and is responsible for accidents or injuries occurring to themselves, other people or property.

ALWAYS remove key (if equipped) and disconnect wire from spark plug before assembly. Unintentional engine start up can cause death or serious injury.

Complete a walk around inspection of unit and work area to understand:

work area

your unit

all safety decals.

Clear work area of stones, sticks, wire and foreign objects which might be picked up and thrown. Tall grass can hide obstacles.

Know the work area. Stay alert for holes, rocks, rough terrain and hidden hazards.

Keep away from drop-offs,ditches, or embankments that could cause operator to lose footing or control of unit.

ALWAYS be aware of traffic when operating along streets or curbs.

Keep work area clear of all persons, children and pets.

Keep children out of the work area and under the watchful care of a responsible adult.

ALWAYS operate unit when there is good visibility and light.

DO NOT mow wet grass.

ALWAYS be sure of your footing. Keep a firm hold on handlebar. Walk, NEVER run.

Engine/blade control feature on mower stops engine and blade within 3 seconds whenever operator releases handlebar. Check this feature frequently. If feature fails to operate, disconnect spark plug wire and adjust or have it repaired before using unit.

Only trained adults may operate or service unit. Training includes actual operation. The owner is responsible for training users.

NEVER operate after or during the use of medication, drugs or alcohol. Unit requires complete and unimpaired attention.

NEVER allow children to use or service mower.

ALWAYS keep hands and feet away from rotating parts. Rotating parts can cut off body parts.

ALWAYS keep hands away from pinch points.

Fumes from engine exhaust can cause death or serious injury. DO NOT run engine in an enclosed area.

ALWAYS protect eyes, face, and body with adequate safety gear and protective clothes. Wear sturdy footwear, gloves, a hard hat and safety goggles or safety glasses with side shields while operating mower.

Wear appropriate hearing protection.

NEVER operate mower barefoot or when wearing open sandals or canvas shoes.

NEVER wear loose clothes, long hair or jewelry that may get caught in rotating parts.

ALWAYS stand clear of discharge when operating unit.

NEVER direct discharge toward bystanders. Operator is responsible for bystander safety. DO NOT touch hot parts. Allow parts to cool.

Keep safety devices or guards in place and functioning properly. NEVER modify or remove safety devices.

Read, understand, and follow all instructions in the manual and on the machine before starting. Understand:

How to operate all controls

The functions of all controls

How to STOP in an emergency. DO NOT attempt to start your engine until

you know what the controls do and how they work.

DO NOT tilt mower when starting it. Keep feet away when starting engine.

DO NOT start the engine or operate mower without side discharge cover or side discharge deflector installed.

Never leave a running unit unattended.

Take all possible precautions when leaving unit unattended.

ALWAYS shut off engine, remove key (electric start models) and disconnect spark plug wire to prevent accidental starting or unauthorized use.

Stop engine if anyone enters the work area.

NEVER attempt to make any adjustments to unit while engine is running (except where specifically recommended). Stop engine, remove key (electric start models) and wait for all moving parts to stop before servicing.

DO NOT make cutting height wheel adjustments while the engine is running.

If you strike an object, or if equipment vibrates abnormally, stop engine at once, wait for moving parts to stop and disconnect wire from spark plug. Repair any damage before restarting unit.

Keep rear door closed when engine is running unless the grass bag is in place.

GB - 5

Stop engine before removing and emptying grass bag.

When mulching or bagging, ALWAYS install discharge cover.

When side discharging, ALWAYS install side discharge deflector.

ALWAYS shut off engine, allow blade to stop and disconnect spark plug wire before clearing clogs or cleaning unit.

Check grass bag for wear, damage, and/or deterioration. Replace only with Ariens original equipment replacement parts for safety.

To reduce fire hazard and overheating, keep equipment free of grass, leaves, debris or excessive lubricants.

Use extra care when approaching blind corners, shrubs, trees, or other objects which may obscure vision.

DO NOT mow at too fast a rate. DO NOT change engine governor setting or overspeed the engine.

Do not operate mower on gravel or loose material such as sand. Stop mower when crossing drives, walks, or roads to prevent damage or injury from thrown objects.

DO NOT pull mower backwards unless absolutely necessary. Look down and back, especially for small children, before and while moving backwards.

On self-propelledmodels, releasing wheel drive control must stop mower’s forward movement. If this feature fails to operate, disconnect spark plug wire and repair before using unit.

On self-propelledmodels, wheel drive must be disengaged when starting engine.

DO NOT operate on steep slopes.

NEVER leave unit unattended on a slope. Chock wheels if parking on a slope.

Mow across the face of slopes, never up and down. Be especially cautious when changing direction on slopes.

This product is equipped with an internal combustion engine. DO NOT use on or near any unimproved, forest or brush covered land unless the exhaust system is equipped with a spark arrestor meeting applicable local, state or federal laws. A spark arrestor, if used, must be maintained in effective working order by the operator. See your Ariens Dealer or engine manufacturer’s service center.

Fuel is highly flammable and its vapors can explode. ONLY use approved fuel containers.

NO Smoking!

NO Sparks!

NO Flames!

Allow engine to cool before filling fuel tank.

Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers on the ground away from your vehicle before filling.

When practical, remove gas-poweredequipment from the truck or trailer and refuel it on the ground. If this is not possible, then refuel such equipment on a trailer with a portable container, rather than from a gasoline dispenser nozzle.

Keep the nozzle in contact with the rim of the fuel tank or container opening at all times until fueling is complete. Do not use a nozzle lockopen device.

Check fuel supply before starting engine.

DO NOT fill gasoline tank indoors, when engine is running, or while engine is hot.

Allow engine to cool several minutes before removing fuel cap.

DO NOT overfill. Allow about 1/4" (6 mm) of tank space for fuel expansion.

Replace gasoline tank cap securely and clean any spilled fuel before starting engine.

If fuel is spilled on clothing, change clothing immediately.

NEVER store fuel inside where there is an open flame, such as a water heater.

ALWAYS drain fuel outdoors away from ignition sources.

ALWAYS shut off engine , and remove key, and close fuel shutoff valve when transporting unit on a truck or trailer.

Avoid Electric Shock. DO NOT disconnect wire from spark plug while engine is running.

Do NOT put battery in fire or mutilate. Explosive Gases!

NO flames, NO sparks, NO smoking, near battery.

Poisonous battery fluid contains sulfuric acid. Contact with skin, eyes or clothing can cause severe chemical burns.

ALWAYS wear safety glasses and protective gear near battery.

ALWAYS keep batteries out of reach of children.

GB - 6

Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

Charge batteries in an open, well-ventilatedarea, away from spark and flames. Unplug charger before connecting or disconnecting battery. Wear protective clothing and use insulated tools.

Accidental engine start up can cause death or serious injury. Except where specifically recommended, ALWAYS stop engine, remove key (electric start models), wait for moving parts to stop, allow parts to cool and disconnect spark plug wire before inspecting, servicing, adjusting or repairing unit.

Keep mower free of grass, leaves, or other debris build-up.

Keep equipment in good condition.

Maintain or replace safety and instruction labels, as necessary.

Follow engine manufacturer’s safety instruction when servicing engine.

Check all hardware at regular intervals, especially blade attachment bolts. Keep all hardware properly tightened.

An extension spring, when extended, stores energy and can be dangerous. Always use tools specifically designed for installing or removing an extension spring. Always compress or extend springs slowly.

Before tipping unit, remove fuel and battery (if equipped).

Use extra care when loading or unloading unit onto trailer or truck.

Ensure all wheel blocks, jack stands and tie downs will support unit during maintenance.

Replace worn-outmufflers immediately. Continued use could result in fire or explosion.

Sharp edges can cut or amputate fingers or a hand. Wrap blade or wear sturdy gloves to service.

Only replace blades. NEVER straighten or weld blades.

Use only replacement parts designed for your unit. See your Ariens Dealer.

Allow engine to cool before storing in any enclosure.

ALWAYS clean unit before extended storage. See engine manual for proper storage.

DO NOT store unit inside a building with fuel in the fuel tank where any ignition sources are present.

Use only accessories which have been approved by Ariens and are properly installed.

Use only accessories or attachments that are designed for your unit and that can be used safely on your terrain.

Check attachments frequently and replace worn or damaged components with manufacturer’s recommended parts.

GB - 7


CAUTION: AVOID INJURY. Read and understand the entireSafety section before proceeding.








1.Mower Unit

2.Mulch Cover

3.Side Discharge Chute

4.Mulch Plug

5.Literature Pack

6.Grass Bag

Figure 3



NOTE: Remove all foam packaging from the unit.

1.Remove mower and handlebar from carton.

2.Install the handlebars on the pivot pins attached to the handlebar uprights.

NOTE: Make sure the cables (connected to the handlebar) are on the left side of the unit.

3.Remove the handlebar mounting hardware from the handlebar uprights.

4.Rotate the handlebar up or down to the desired height and align the mounting holes with the holes in the handlebar upright.

5.Secure the handlebars in position with hardware removed in step 3.

911110, 111

911112, 113

Figure 4

GB - 8

6.Connect the engine/blade control cable to the engine.

Route the z-bendcable end into engine shutoff lever as shown below.

Insert the cable connector into the cable mounting bracket on the engine. Make sure the connector snaps into place securely.

911110, 111

911112, 113

Figure 5

7.Fill engine crankcase with oil. See engine manual.

8.Set-upmower for bagging, side discharge or mulching. SeeMOWER SET-UP on page 14.

NOTE: Bagging is not standard on push models. SeeACCESSORIES on page 24 for kit part numbers.

9.Fill fuel tank. See FILLING THE FUEL TANK on page 13.

10.Connect the battery. See BATTERY (electric start models) on page 21.

11.Connect spark plug wire.

12.Check the engine/blade control feature. Try starting the engine without the engine/blade control held against the handlebar. Engine must not start. If engine starts, stop engine and bring the unit to your dealer for adjustment or repair.

GB - 9













































































































































































Figure 6




Engine/Blade Control (911110, 111)


Side Discharge Chute


Wheel Drive Control (911111)


Mulch Plug




Handlebar Adjustment Holes


Grass Bag


Recoil Starter Handle


Rear Door

18. Speed Control Knob


Fuel Tank and Cap


Ignition Switch (911113)


Oil Fill/Dipstick


Battery (911113)


Muffler and Muffler Guard


Integrated Engine/Blade and Wheel


Cutting Height Levers (2 Rear Wheel


Drive Control (911112, 113)


Adjusters, 2 Front Wheel Adjusters)


Choke Control (911112, 113)

10.Lift Handle

11.Primer Bulb

12.Air Filter

13.Mulch Cover

GB - 10