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NO smoking, NO sparks, NO flames. ALWAYS allow engine to cool before servicing. NEVER fill fuel tank when engine is running or hot from operation. NEVER fill or drain fuel tank indoors. Replace fuel cap securely and clean up spilled fuel. 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-powered equipment 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 lock-open device. If fuel is spilled on clothing, change clothing immediately. Before tipping unit up onto housing, remove fuel so no spills will occur. Ensure unit is secure and will not tip over during maintenance. ALWAYS keep protective structures, guards, and panels in good repair, in place and securely fastened. NEVER modify or remove safety devices. DO NOT change engine governor settings or over- speed engine. Fumes from engine exhaust can cause injury or death. DO NOT run engine in an enclosed area. Always provide good ventilation. ALWAYS maintain unit in safe operating condition. Damaged or worn out muffler can cause fire or explosion. Keep all hardware properly tightened. Check shear bolts frequently. Check slip clutch on units so equipped. Maintain or replace safety and instruction labels, as necessary. NEVER store unit with fuel in fuel tank, inside a building where any ignition sources are present such as hot water heaters, space heaters, or clothes dryers. Allow the engine to cool before storing in any enclosure. For extended storage, clean unit thoroughly. See Engine Manual for proper storage. Use only attachments or accessories designed for your unit. Check components frequently. If worn or damaged, replace with manufacturer’s recommended parts. SECTION 3 - SPECIFICATIONS Model Number 939001 939002 939300 Description ST520E ST520 ST520 Engine - Tecumseh LH195SA LH195SA OH195SA Engine Power – hp (kW) at Maximum RPM 5.0 (3.7) 5.0 (3.7) 5.9 (3.7) Fast Idle Speed-RPM (min-1) 3600 ± 150 Displacement - in. (cc) 11.88 (195) Electric Start 120V Recoil Recoil Fuel See Engine Manual Tank Capacity - qt. (L) 2.0 (1.96) 3.0 (2.8) Snow Clearing Width - in. (cm) 20 (50.8) Chute Rotation Angle 200° Impeller Diameter - in. (cm) 12 (30.5) Speed-RPM-Max (min-1) 1200 Auger Diameter - in. (cm) 11.0 (27.98) Speed-RPM-Max (min-1) 120 Auger Brake Yes Drive Clutching Wet Sump Gearbox Speeds 1 Forward Pneumatic Tires - in. 10 Size and Weight Height - in. (cm) 43.13 (109.53) Length - in. (cm) 51.25 (130.18) Width - in. (cm) 22.38 (56.84) Weight - lb (Kg) 125 (56.7) 120 (54.4) 121 (54.8) SECTION 4 - GENERAL MAINTENANCE & ADJUSTMENTS 4.1 CONTROLS AND FEATURES 317141117211812945101921523612132022161. Attachment Clutch Lever2.Traction Drive Clutch Lever3.Chute Handle (939001, 002) 4.Discharge Chute Deflector5.Discharge Chute6.Impeller7.Clean-Out Tool8.Auger9.Scraper Blade10.Auger Gear Case11.Oil Fill and Dipstick12.Gas Tank and Cap13.Electric Starter (939001) 14.Recoil Starter Handle15.Primer Bulb16.Oil Drain Plug17.Throttle (Engine Stop) 18.Ignition Switch (push-pull) 19.Choke20.Spark Plug and Wire21.Runner(s) 22.Belt Cover23.HandlebarOS7350Figure 38OS7355 Ariens dealers provide any service or adjustments required to keep your unit operating at peak efficiency. Should engine service be required, contact an Ariens dealer or an authorized engine manufacturer's service center. WARNING: AVOID INJURY. Read and understand the entire Safety section before proceeding. 4.2 SERVICE POSITION WARNING: Before tipping unit up onto housing, remove fuel so no spills will occur and remove battery (if equipped). Ensure unit is secure and will not tip over during maintenance. Place unit on a flat level surface. Tip machine forward onto front of impeller housing for service as shown in Figure 4. Assure unit is secure and will not tip over. Strap and clamp onto bench if needed. NOTE: Machine should remain in horizontal position to service attachment and drive belts. Do not tip machine forward. Service PositionOS7125 Figure 4 4.3 STOPPING IN AN EMERGENCY Immediately release both control levers to stop unit in an emergency. Stop engine, remove key and wait for all rotating parts to stop before leaving operator’s position. 4.4 STARTING AND SHUTTING OFF WARNING: FAILURE TO FOLLOW INSTRUCTIONS could result in personal injury and/or damage to unit. DO NOT attempt to start your unit at this time. Read entire Owner/ Operator Manual and the Engine Manual first. IMPORTANT: Allow unit and engine to adjust to outdoor temperatures before clearing snow. Before shut-off, run the attachment a few minutes to prevent freeze-up. IMPORTANT: Try each control without the engine running to see how ...

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