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Husqvarna ST 121E Operator's Manual

Walk-behind snow throwers
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Operator's Manual
ST 121E
Gasoline containing up to 10% ethanol (E10) is acceptable for use in this machine.
The use of any gasoline exceeding 10% ethanol (E10) will void the product warranty.
Please read the owner's manual carefully and make sure you
532 44 30-86 Rev. 6
English
understand the instructions before using the machine.

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  Summary of Contents for Husqvarna ST 121E

  • Page 1 Operator’s Manual ST 121E Gasoline containing up to 10% ethanol (E10) is acceptable for use in this machine. The use of any gasoline exceeding 10% ethanol (E10) will void the product warranty. Please read the owner's manual carefully and make sure you 532 44 30-86 Rev.
  • Page 2: Safety Rules

    CONGRATULATIONS on your purchase of a new snow thrower. It has been designed, engineered and man u fac tured to give best possible dependability and per for mance. Should you experience any problem you cannot easily remedy, please contact your nearest authorized service center. We have competent, well-trained tech ni cians and the proper tools to service or repair this unit.
  • Page 3: Product Specifications

    Operation Maintenance and Storage 1. Do not put hands or feet near or under rotating parts. 1. Check shear bolts and other bolts at frequent intervals Keep clear of the discharge opening at all times. for proper tightness to be sure the equipment is in safe working condition.
  • Page 4: Table Of Contents

    TABLE OF CONTENTS SAFETY RULES ............2-3 OPERATION ............8-11 PRODUCT SPECIFICATIONS ........3 MAINTENANCE ............. 12-16 CUSTOMER RESPONSIBILITIES ........ 3 STORAGE ..............17 SAFETY AND INSTRUCTIONAL DECALS ....4 TROUBLESHOOTING ..........18 ASSEMBLY ..............5-6 WARRANTY ............20-23 PRODUCT OVERVIEW ..........7 KNOW YOUR SNOW THROWER READ THIS OWNER'S MANUAL AND ALL SAFETY RULES BEFORE OPERATING YOUR SNOW THROWER.
  • Page 5: Assembly

    ASSEMBLY Setup 4. Pull up and push down slightly on the handle to verify handle is locked into place (Figure 4). LOOSE PARTS NOTE: If handle feels unsecure with the adjustment levers closed, tighten adjustment handle nuts until the Use the chart below to verify that all parts have been handle feels secure.
  • Page 6 ASSEMBLY Installing the Discharge Chute Filling the Engine with Oil 1. Install the chute deflector to the discharge chute using ENGINE bolts and, washer, nut, deflector knob and cap plunger (Figure 6). See engine manual. 2. Install the discharge chute to the chute base using LUBRICATION three screws and nuts.
  • Page 7: Product Overview

    PRODUCT OVERVIEW Product Overview 6, *7 Figure 8 1. Discharge chute 9. Ignition key 2. Chute deflector 10. Chute rotator handle 3. Fuel tank cap 11. Recoil start handle 4. Primer 12. Control bar 5. Electric-start button 13. Lights (if equipped) 14.
  • Page 8: Operation

    OPERATION Operation IMPORTANT: Do not use E85 blended fuels. This engine is not E20/E30/E85 compatible. Alternative fuels with high alcohol content can cause hard starting, poor engine NOTE: Determine the left and right sides of the machine performance, and may cause internal engine damage. from the normal operating position.
  • Page 9: Starting The Engine

    OPERATION Starting the Engine 1. Push key in (Figure 10). 2. Move choke lever to left position. 3. Firmly push in the primer 2 times with your thumb, holding the primer in a for a second before releasing it each time. NOTE: Remove your glove when you push in the primer so that air cannot escape from the primer hole.
  • Page 10: Stopping The Engine

    OPERATION Engaging the Auger Blades 1. To engage the auger blades, hold the control bar against the handle (Figure 13). Figure 15 1. Rub Area 2. Wear Areas Stopping the Engine Figure 13 1. Control bar 1. To stop the engine, pull key out (Figure 16). Disengaging the Auger Blades 1.
  • Page 11 OPERATION Preventing Freeze-up After Use 2. To raise or lower the angle of the chute deflector, loosen both chute deflector knobs on the chute deflector and move the chute deflector up or down to desired position • Let the engine run for a few minutes to prevent moving and retighten knobs (Figure 18).
  • Page 12: Maintenance

    MAINTENANCE Maintenance NOTE: Determine the left and right sides of the machine from the normal operating position. Check for Loose Fasteners Clean / Inspect Snow Thrower Clean / Replace V-Belts Check / Replace Auger Blades and Scraper Bar Check Fuel Lines and Electrical Wires Check Engine Oil Level Change Engine Oil Inspect Muffler...
  • Page 13: Changing The Engine Oil

    MAINTENANCE Inspecting the Auger Blades/ 5. After draining the used oil, return the snowthrower to the operating position. Scraper Bar 6. Screw in the oil fill cap/dipstick (1) and hand tighten it Before each session, inspect the auger blades for wear. securely.
  • Page 14: Servicing The Spark Plug

    MAINTENANCE 8. Unsnap top cover by firmly pulling upwards at the Servicing the Spark Plug rear section of the cover disengaging the three clips (Figure 28). Use a NGK BPR6ES, Champion RN9YC, or BOSCH 9. Shift top cover until fuel tank is clear of the rear upper WR6DC spark plug or equivalent.
  • Page 15 MAINTENANCE 19. Install the spark plug and torque it to 20–22 ft-lb 15. Disconnect the spark plug wire from the spark plug (27–30 N-m). (Figure 30). 20. Connect the spark plug wire to the spark plug 16. Clean around the spark plug. (Figure 30).
  • Page 16 MAINTENANCE 4. Install the new auger v-belt and drive pulley, routing it Replacing the Auger V-Belt as shown in (Figure 34). NOTE: Route the new auger v-belt first around the engine If auger v-belt becomes worn, oil-soaked, excessively pulley, then the idler pulley, and finally around the drive cracked, frayed, or otherwise damaged, replace the belt.
  • Page 17: Storage

    STORAGE Storage ENGINE OIL Drain oil (with engine warm) and replace with clean engine oil. (See “Changing the Engine Oil” section of this man ual). STORING THE SNOWTHROWER Immediately prepare your snow thrower for storage at CYLINDER the end of the season or if the unit will not be used for 30 1.
  • Page 18: Troubleshooting

    TROUBLESHOOTING Troubleshooting See appropriate section in manual unless directed to a service center/department. PROBLEM CAUSE CORRECTION Does not start 1. Safety ignition key is not inserted. 1. Insert safety ignition key. 2. Out of fuel. 2. Fill fuel tank with fresh, clean gasoline. 3.
  • Page 19 SERVICE NOTES...
  • Page 20 (a) Engines and Attachments.Except where otherwise indicated on Exhibit A, all Engines and Attachments are not covered by this Limited Warranty. In most cases, these items are NOT manufactured by Husqvarna in which case they may be covered separately by their respective manufacturer's warranties if one is provided and included with the product at the time of purchase.
  • Page 21 10. Authorized Husqvarna Servicing Dealer/Center. In order to obtain warranty coverage it is your responsibility (at your expense) to deliver or ship your Husqvarna unit to an authorized Husqvarna Servicing Dealer/Center and arrange for pick-up or return of your unit after the repairs have been made.
  • Page 22: Warranty

    Riding Lawn Tractors: Frame, Chassis, Front Axle 5 Years No Warranty No Warranty Engine* Transmission (if made by Husqvarna/Peerless) 3 Years No Warranty No Warranty Transmission (if third party)** XLS Models only - stamped deck shell. Armor Protected Limited Warranty...
  • Page 23 ** See reference 1 (b) of the warranty statement. RZ - Two (2) Year Consumer warranty, parts & labor, with Hydro-Gear Distributor network. EZ - One (1) Year Commercial warranty, parts & labor, with Husqvarna. Two (2) Year Consumer warranty, parts & labor, with Hydro-Gear Distributor network.
  • Page 24 07/06/2012 TH...