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Manafacture: McCulloch File size: 6.94 mb File name: MOUS2010_436440.pdf Language of manual:

Do not use plastic. Plastic cannot breathe, which allows condensation to form and will cause your snow thrower to rust. IMPORTANT: Never cover snow thrower while engine/ exhaust area is still warm. 16 Troubleshooting See appropriate section in manual unless directed to an authorized service center/department. PROBLEM CAUSE CORRECTION Does not start 1. Fuel shut-off valve (if so equipped) in OFF position. 2. Safety ignition key is not inserted. 3. Out of fuel. 4. Throttle in STOP position (or ON/OFF switch is OFF). 5. Choke in OFF position. 6. Primer not depressed. 7. Engine is flooded. 8. Spark plug wire is disconnected. 9. Bad spark plug. 10. Stale fuel. 11. Water in fuel. 1. Turn fuel shut-off valve to OPEN position. 2. Insert safety ignition key. 3. Fill fuel tank with fresh, clean gasoline. 4. Move throttle to FAST position (or ON/OFF switch to On position). 5. Move to FULL position. 6. Prime as instructed in the Operation section of this manual. 7. Wait a few minutes before restarting, DO NOT prime. 8. Connect wire to spark plug. 9. Replace spark plug. 10. Empty fuel tank & carburetor, refill with fresh, clean gasoline. 11. Empty fuel tank & carburetor, refill with fresh, clean gasoline. Loss of power 1. Spark plug wire loose. 2. Throwing too much snow. 3. Fuel tank cap is covered with ice or snow. 4. Dirty or clogged muffler. 5. Improper cable length. 1. Reconnect spark plug wire. 2. Reduce speed and width of swath. 3. Remove ice and snow on and around fuel tank cap. 4. Clean or replace muffler. 5. Adjust cable. Engine idles or runs roughly 1. Choke is in FULL position. 2. Blockage in fuel line. 3. Stale fuel. 4. Water in fuel. 5. Carburetor is in need of adjustment or overhaul. 1. Move choke to OFF position. 2. Clean fuel line. 3. Empty fuel tank & carburetor, refill with fresh, clean gasoline. 4. Empty fuel tank & carburetor, refill with fresh, clean gasoline. 5. Contact an authorized service center/department. Excessive vibration 1. Loose parts or damaged augers or impeller. 1. Tighten all fasteners. Replace damaged parts. If vibration remains, contact an authorized service center/department. Recoil starter is hard to pull 1. Frozen recoil starter. 1. See “IF RECOIL STARTER HAS FROZEN” in the Operation section of this manual. Loss of traction drive / slowing of drive speed 1. Drive belt is worn. 2. Drive belt is off of pulley. 3. Auger blades worn. 1. Check / replace drive belt. 2. Check / reinstall drive belt. 3. Contact an authorized service center/department. Loss of snow discharge or slowing of snow discharge 1. Auger belt is off of pulley. 2. Auger belt is worn. 3. Clogged discharge chute. 4. Augers / impeller jammed. 1. Check / reinstall auger belt. 2. Check / replace auger belt. 3. Clean snow chute. 4. Remove debris or foreign object from augers / impeller. 17 REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621ES (96182000600) CHUTE ASSEMBLY 5 SSST-Chute asm 5 1 NOTE: All component dimensions given in U.S. inches. 1 inch = 25.4 mm IMPORTANT: Use only Original Equipment Manufacturer (O.E.M.) replacement parts. Failure to do so could be hazardous, damage your snow thrower and void your warranty. 18 REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621ES (96182000600) CHUTE ASSEMBLY KEY PART NO. NO. QTY DESCRIPTION 1 532 43 48-77 1 CHUTE.RATCHETING.PLASTIC.W/GRV 2 532 43 76-40 2 PLATE.CHUTE.RETAINER 3 532 43 76-35 1 PLATE.CHUTE.BASE 4 817 41 13-12 6 BOLT.HEX.WSH.HD.13-16 X 3/4 5 532 43 76-42 1 HANDLE.CHUTE.MS428 6 873 97 05-00 4 NUT.LOCK.HX.W/INS 5/16-18 UNC PL 7 532 43 48-79 1 SPRING.RATCHET.ARM 8 532 08 13-28 1 BOLTSHOULDER.1/4-20 UNC X .94 9 532 43 48-78 1 ARM.CHUTE.RATCHET 10 532 13 20-04 1 HEX.NUT.1/4-20 NYLON LOCKING 11 532 43 76-26 1 PLENUM 15 532 43 73-18 5 CARRIAGE.BOLT 16 532 43 76-55 1 CHUTE 17 532 19 19-38 1 HANDLE.KNOB 18 532 43 76-43 1 DEFLECTOR.CHUTE 19 819 13 13-16 3 WASHER 20 819 13 20-16 1 WASHER.RATCHET. PAWL 21 532 42 88-67 1 BOLT NOTE: All component dimensions given in U.S. inches. 1 inch = 25.4 mm IMPORTANT: Use only Original Equipment Manufacturer (O.E.M.) replacement parts. Failure to do so could be hazardous, damage your snow thrower and void your warranty. REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621ES (96182000600) HANDLE ASSEMBLY SSST-Handle asm 1 KEY PART NO. NO. QTY DESCRIPTION 1 532 43 76-67 1 BAIL.HANDLE.PAINT.MS431 2 532 43 76-64 1 HANDLE.PNT.UPPER.SSST 3 532 43 48-06 1 CONTROL.CABLE 4 532 19 19-38 2 KNOB.HANDLE.BLACK 5 532 19 15-74 2 BOLT.HANDLE.BLACK PATCHED 6 532 14 50-06 1 CLIP.PUSH-IN.HINGED NOTE: All component dimensions given in U.S. inches. 1 inch = 25.4 mm IMPORTANT: Use only Original Equipment Manufacturer (O.E.M.) replacement parts. Failure to do so could be hazardous, damage your snow thrower and void your warranty. 20 REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621ES (96182000600) AUGER ASSEMBLY KEY PART NO. NO. QTY DESCRIPTION 1 872 11 04-07 12 BOLT. CARRIAGE 2 532 43 76-20 1 PI...

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