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Walk Behind Lawn Mower
Owner/Operator Manual
Models
911133 – LM21S
911134 – LM21SW
911160 – LM21
911161 – LM21 CARB
911162 – LM21S
911163 – LM21S CARB
911164 – LM21SW
911165 – LM21SW CARB
01282300 11/07
ENGLISH
Printed in USA
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TABLE OF CONTENTS Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Storage. . . . . . . . . . . . . . . . . . . . . . . . . 21 Assembly . . . . . . . . . . . . . . . . . . . . . . . . 8 Troubleshooting . . . . . . . . . . . . . . . . . 21 Controls and Features . . . . . . . . . . . . . 9 Service Parts . . . . . . . . . . . . . . . . . . . . 22 Operation . . . . . . . . . . . . . . . . . . . . . . . 10 Accessories . . . . . . . . . . . . . . . . . . . . . 22 Maintenance. . . . . . .
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PRODUCT REGISTRATION DEALER DELIVERY The Ariens dealer must register the product Dealer should: at the time of purchase. Registering the 1. Check that all assembly and product will help the company process adjustments have been properly warranty claims or contact you with the latest completed. service information. All claims meeting 2. Fill out Original Purchaser Registration requirements during the limited warranty Card and return the card to Ariens. period will be honored, whether or no
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1. DANGER! CAUTION: POTENTIALLY TO AVOID SERIOUS INJURY OR DEATH HAZARDOUS SITUATION! If not avoided, MAY RESULT in minor or moderate injury. It may also be Read the operator’s manual. used to alert against unsafe practices. OL1801 NOTATIONS NOTE: General reference information for Keep children and others away proper operation and maintenance practices. from unit while operating. IMPORTANT: Specific procedures or information required to prevent damage to unit or attachment. OL4370 PRA
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NEVER operate after or during the use of SAFETY RULES medication, drugs or alcohol. Unit requires If unit is to be used by someone other than complete and unimpaired attention. original purchaser; loaned, rented or sold, ALWAYS provide this manual and any NEVER allow children to use or service needed safety training before operation. mower. Learn applicable rules and laws in your area, ALWAYS keep hands and feet away from including those that may restrict the age of rotating parts. Rotatin
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NEVER attempt to make any adjustments to Mow across the face of slopes, never up and unit while engine is running (except where down. Be especially cautious when changing specifically recommended). Stop engine, direction on slopes. remove key (electric start models) and wait This product is equipped with an internal for all moving parts to stop before servicing. combustion engine. DO NOT use on or near DO NOT make cutting height wheel any unimproved, forest or brush covered land adjustmen
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ALWAYS drain fuel outdoors away from Ensure all wheel blocks, jack stands and tie ignition sources. downs will support unit during maintenance. ALWAYS shut off engine, and remove key, Replace worn-out mufflers immediately. and close fuel shutoff valve when transporting Continued use could result in fire or unit on a truck or trailer. explosion. Avoid Electric Shock. DO NOT disconnect Sharp edges can cut or amputate fingers or a wire from spark plug while engine is running. hand. Wrap blade o
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ASSEMBLY ASSEMBLY CAUTION: AVOID INJURY. Read 1. Unfold and adjust handlebar. See and understand the entire Safety HANDLEBAR HEIGHT on page 18. section before proceeding. NOTE: DO NOT bend the speed control rod (if equipped) when unfolding the handlebars. CARTON CONTENTS 2. Fill engine crankcase with oil. See engine manual. 3. Set-up mower for bagging, side 1 discharge or mulching. See MOWER SET-UP on page 13. 4. Fill fuel tank. See FILLING THE FUEL TANK on page 12. 2 5. Connect spark pl
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CONTROLS AND FEATURES 2 1 3 5 4 19 6 7 13 18 1 2 12 17 3 11 5 6 19 8 10 7 14 9 8 18 13 12 11 17 11 16 15 7 9 OM3195 14 10 11 Figure 4 1. Engine/Blade Control 11. Cutting Height Levers (2 Rear Wheel Adjusters, 2 Front Wheel Adjusters) 2. Wheel Drive Control (911133, 134, 162, 163, 164, 165) 12. Primer Bulb 3. Adjustable and Folding Handlebars 13. Air Filter 4. Swivel Wheel Lock (911134, 164, 165) 14. Side Discharge Cover 5. Grass Bag 15. Side Discharge Deflector 6. Rear Door 16. Mulchmaster™
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OPERATION CONTROLS AND FEATURES Handlebar Adjust handlebar to a safe and comfortable See Figure 4 for locations. height. See HANDLEBAR HEIGHT on page 18. WARNING: Improper operation can lead to injury. Learn what the Recoil Starter Handle controls do and how they work. When pulled, handle will turn engine over. Thoroughly read and understand entire Operator Manual. CUTTING HEIGHT ADJUSTMENT DANGER: Avoid injury from CAUTION: AVOID INJURY. Read rotating blade. and understand the entire Sa
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Rear Low Low 1 High High 1 Rear Low High 1 Front OM0165 2 Front OM1270 1. Cutting Height Lever 3 1. Cutting Height Lever Figure 5 2. Height Adjuster Pin 3. Key Ring Swivel Wheel Models (911134, 164, 165) Figure 6 To change front wheel cutting height, insert height adjuster pin into the holes that match OPTIONAL CONTROLS the desired cutting height and fasten with key ring (Figure 6). Primer Bulb To change rear wheel cutting height, move Push the primer bulb in to add fuel for easier cuttin
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Fast –Push rod all the way forward. OM1240 STOP GO Slow –Pull rod all the Swivel Wheel Lock (911134, 164, 165) way rearward. CAUTION: Avoid loss of control. Lock swivel wheels when mowing on a slope or hill. Do not mow on steep slopes. To hold wheel straight: 1. Push swivel wheel lock forward. Figure 7 2. Push unit forward until wheel locks in place. Start mowing slowly and use speed control To allow wheel to swivel: rod to gradually increase speed to a safe, 1. Pull swivel wheel lock ba
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There should be no openings between bag MOWER SET-UP and mounting surface after installing bag. If necessary, clear debris from bag mounting CAUTION: DO NOT operate surface. mower unless either side Grass Bag Removal discharge cover or side discharge deflector is installed. Thrown 1. Shut off unit. objects may cause damage or 2. Lift rear door. injury. Never operate unit with 3. Use handle to lift bag off mounting rear door open unless grass bag flange. is in place. 4. Close rear doo
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4. With engine/blade control held against the handlebar, grasp starter handle and pull rope slowly until it pulls harder. This is the compression stroke. Let rope rewind slowly. 5. Pull rope with rapid continuous full arm Mulchmaster Plug stroke to start engine. Allow rope to rewind slowly. IMPORTANT: DO NOT let starter handle snap against bracket. 6. Repeat steps 4 and 5 until engine starts. (If engine does not start, see TROUBLESHOOTING on page 21.) Shut Off 1. Release wheel drive co
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MAINTENANCE MAINTENANCE CAUTION: AVOID INJURY. Read and understand the entire Safety SCHEDULE section before proceeding. Before 25 hrs 50 hrs 100 Service Each hrs Ariens Dealers will provide any service, parts Performed Use or adjustments which may be required to keep your unit operating at peak efficiency. Check � Should engine require service, contact an Engine/Blade Control Ariens Dealer or an authorized engine manufacturer's service center. Check Wheel � Drive Control MAINTENANCE
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CHECK GRASS BAG Sharpen the Mower Blades Check grass bag frequently for wear or CAUTION: DO NOT sharpen deterioration. Replace worn or damaged bag mower blades while on unit. An with Ariens original equipment replacement imbalanced mower blade will bag only. cause excessive vibration and eventual damage to unit. Check CLEAN UNIT mower blade balance before Before each use clean unit, muffler and reinstalling blades. engine surfaces of debris, oil or fuel spills to NEVER weld or straigh
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3. Check mower blade balance. GENERAL LUBRICATION Slide mower blade on an unthreaded Swivel Wheels (911134, 164, 165) bolt. A balanced blade should remain in See Figure 13. a horizontal position. If either end of mower blade moves downward, sharpen Use Mix Hi-Temp Grease or equivalent on the the heavy end until blade is balanced lube fittings. Order P/N: 00036800 - 3 pack of (Figure 12). 3 oz. cartridges. 4. Install mower blade on unit. 5. Tighten the bolts to a torque of 37.5 - Lube Fit
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SERVICE AND ADJUSTMENTS DRIVE BELT REPLACEMENT CAUTION: AVOID INJURY. Read (SELF-PROPELLED MODELS) and understand the entire Safety To remove drive belt: section before proceeding. 1. Disconnect spark plug wire. 2. Set the right rear wheel to its lowest SERVICE POSITION cutting height, and the left rear wheel to Put unit into service position for easy access the third cutting height. This position to underneath the deck. provides clearance between friction disc and drive sheave. 3. Remov
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WHEEL DRIVE CONTROL To increase the gap, ADJUSTMENT (SELF-PROPELLED loosen the lower MODELS) cable nut. See Figure 16. NOTE: When the wheel drive control is disengaged, the gap between the friction disc and the aluminum drive plate should be approximately .030" (0.7mm). See Figure 16. Friction Disc Aluminum Drive Plate Approx. .030" (0.7mm) Figure 16 Check the adjustment with the engine off and Then tighten the upper with the engine on: cable nut against the 1. With the engine off and
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SPEED CONTROL BELL CRANK To decrease the gap, (SELF-PROPELLED MODELS) loosen the upper cable The speed control bell crank holds the speed nut. control rod in position after a speed has been set. The spring washers may become loose with normal wear. If the speed control rod does not stay firmly in position, adjust the speed control bell crank. See Figure 19. To adjust: 1. Remove cover, fully compress the helical spring lock washers with lock nut and then back lock nut off, one quarter
