MC621 Owner's Manual 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. 532 44 36-14 06.07.11 AP/TH Printed in the U.S.A.
CONGRATULATIONS on your purchase of a new snow thrower. It has been designed, engineered and manufactured to give best possible dependability and performance. Should you experience any problem you cannot easily remedy, please contact your nearest authorized service center. We have competent, well-trained technicians and the proper tools to service or repair this unit. Please read and retain this manual. The instructions will enable you to assemble and maintain your snow thrower properly.
Operation Maintenance and Storage 1. Do not put hands or feet near or under rotating parts. Keep clear of the discharge opening at all times. 2. Exercise extreme caution when operating on or crossing gravel drives, walks, or roads. Stay alert for hidden hazards or traffic. 3. After striking a foreign object, stop the engine (motor), disconnect the cord on electric motors, thoroughly inspect the snow thrower for any damage, and repair the damage before restarting and operating the snow thrower. Remove key.
TABLE OF CONTENTS MAINTENANCE ..................................................... 12-16 STORAGE ................................................................... 17 TROUBLESHOOTING ................................................ 18 REPAIR PARTS ..................................................... 19-29 WARRANTY................................................................ 30 SAFETY RULES ........................................................ 2-3 PRODUCT SPECIFICATIONS ............................
Setup Loose Parts Use the chart below to verify that all parts have been shipped. Procedure 1. 2. Description Qty. Use No parts required – Unfold the handle. Carriage bolts Flange nuts Washers Knob Chute Deflector 5 4 2 1 1 1 Install the discharge chute. Install the discharge chute. Install the discharge chute. Install the discharge chute. 1. Unfolding the Handle 2. Installing the Discharge Chute Procedure 1.
3. Filling the Engine with Oil Product Overview ENGINE See engine manual. 13 LUBRICATION NOTE: SAE 10W30 or SAE 5W30 oil is acceptable for use in cold temperatures if engine is difficult to start. 1 4 2 NOTE: Although multi-viscosity oils (5W30, 10W30 etc.) improve starting in cold weather, these multi-viscosity oils will result in increased oil consumption when used above 32°F. Check your engine oil level more frequently to avoid possible engine damage from running low on oil.
NOTE: For best results, purchase only the quantity of gasoline that you expect to use in 30 days. Otherwise, you may add fuel stabilizer to newly purchased gasoline to keep it fresh for up to 6 months. Operation NOTE: Determine the left and right sides of the machine from the normal operating position. Checking the Engine Oil Level • Gasoline is extremely flammable and explosive. A fire or explosion from gasoline can burn you and others.
3. Firmly push in the primer 2 times with your thumb, holding the primer in a for a second before releasing it each time (Figure 11). Starting the Engine 1. Push key in (Figure 9). 1 1 Figure 11 1. Primer Figure 9 1. Key NOTE: Remove your glove when you push in the primer so that air cannot escape from the primer hole. IMPORTANT: It may not be necessary to use the primer or the choke if the engine has been running and is hot. Excessive priming may flood the engine and prevent it from starting. 2.
Engaging the Auger Blades The electrical cord can become damaged, causing a shock or fire. Thoroughly inspect the electrical cord before plugging it into a power source. If the cord is damaged, do not use it to start the snowthrower. Replace or repair the damaged cord immediately. Contact an Authorized Service Dealer for assistance. To engage the auger blades, hold the control bar against the handle (Figure 14). 1 1 Figure 14 1. Control bar Disengaging the Auger Blades Figure 13 1.
IMPORTANT: During initial operation there may be wear between the auger blades and the scraper bar. Maximum performance, both snow throwing and driving, occurs when there is zero clearance between these two parts (Figure 16). Adjusting the Discharge Chute and Chute Deflector To adjust the discharge chute, move deflector chute handle left or right to desired position (Figure 18).
Clearing a Clogged Discharge Chute Operating Tips The auger blades can throw stones, toys, and other foreign objects and cause serious personal injury to the operator or to bystanders. • Keep the area to be cleared free of all objects that the auger blades could pick up and throw. • Keep all children and pets away from the area of operation. • Do not operate snow thrower if weather conditions impair visibility.
Maintenance NOTE: Determine the left and right sides of the machine from the normal operating position.
Adjusting the Control Cable Adjusting the Control Cable Checking the Control Cable 1. With the control bar disengaged, unhook and move the control cable to the highest position. (Figure 21). Release the control bar to remove the slack in the control cable (Figure 20). 1 Position 2 2 3 1 Position 1: Default position (Lower Hole as shown in illustration) Figure 21 1. Control bar 2. Adjuster link 3. Cable positions Figure 20 Inspecting the Auger Blades/ Scraper Bar 1.
7. Clean around the oil filler cap/dipstick (Figure 24). 8. Unscrew the oil fill cap/dipstick and remove it (Figure 25). 9. With the snowthrower in the operating position, carefully pour oil into the oil fill hole until "Full" on the fill cap/dipstick line (Figure 25). Changing the Engine Oil Run the engine a few minutes before changing the oil to warm it. Warm oil flows better and carries more contaminants. Max fill: 18 oz. (0.
Servicing the Spark Plug 5. 6. 7. 8. Remove the oil fill cap. Remove the shroud assembly (Figure 27). Install the oil fill cap. Disconnect the spark plug wire from the spark plug (Figure 28). 9. Clean around the spark plug. 10. Remove the spark plug from the cylinder head. Use a NGK BPR6ES, Champion RN9YC, or BOSCH WR6DC spark plug or equivalent. 1. Stop the engine and wait for all moving parts to stop. 2. Rotate the discharge chute so that it faces forward. 3.
4. Install the new drive belt, routing it as shown in (Figure 31). NOTE: Route the new drive belt first around the engine pulley, then the idler pulley, and finally around the drive pulley while pressing down on the front of the idler arm. (Figure 31). Replacing the Drive Belt If drive belt becomes worn, oil-soaked, excessively cracked, frayed, or otherwise damaged, replace the belt. 1. Remove the drive side cover by removing the six screws as shown in (Figure 30). 5 5.
ENGINE OIL Drain oil (with engine warm) and replace with clean engine oil. (See “Changing the Engine Oil” section of this manual). Storage Storing the Snowthrower CYLINDER 1. Remove spark plug. 2. Pour one ounce (29 ml) of oil through spark plug hole into cylinder. 3. Pull recoil starter handle slowly a few times to distribute oil. Immediately prepare your snow thrower for storage at the end of the season or if the unit will not be used for 30 days or more.
Troubleshooting See appropriate section in manual unless directed to an authorized 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. Loss of power 3. ON/OFF switch is OFF. 3. Move ON/OFF switch to ON position. 4. Choke in OFF position. 4. Move to FULL position. 5. Primer not depressed. 5.
SERVICE NOTES 19
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) CHUTE ASSEMBLY 1 4 4 2 2 4 5 18 3 6 19 19 7 17 6 8 20 15 16 9 10 15 11 21 SSST-Chute asm_5 19 4 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 MC621 (96182000501) CHUTE ASSEMBLY KEY NO. PART 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 BOLT.SHOULDER.1/4-20 UNC X .94 9 532 43 48-78 1 ARM.
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) SHROUD ASSEMBLY 16 5 6 14 1 7 17 17 10 15 17 3 2 10 8 9 4 10 12 SSST-Shroud asm_16 11 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 MC621 (96182000501) SHROUD ASSEMBLY KEY NO. PART NO. QTY DESCRIPTION 1 532 44 33-97 1 COVER.NON-DRIVE.SIDE.MS428 2 532 44 33-98 1 COVER.DRIVE.SIDE.MS428 3 532 44 39-46 1 COVER.TOP.MS428 4 532 43 02-20 1 CAP.ASM.FUEL.2.25"FR.N/CB.E10 5 532 43 62-35 1 BULB.PRIMER 6 532 43 54-07 1 KEY HOUSING 7 532 43 76-48 1 TOP.REAR.COVER 8 532 43 76-31 1 PLATE.EXHAUST.PNT. 9 817 41 13-12 2 BOLT.HEX.WSH.HD.
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) FRAME ASSEMBLY 11 1 10 4 3 12 2 8 3 12 5 6 4 6 9 13 SSST-Frame asm_5 13 13 7 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 MC621 (96182000501) FRAME ASSEMBLY KEY NO. PART NO. QTY DESCRIPTION 1 532 44 41-68 1 LCT.ENGINE.208CC 2 532 44 46-39 1 FRAME.WELDMENT 3 532 43 76-16 2 WHEEL.7X1.5.DMD.GS.3SPK.MS428 4 532 43 54-17 2 NUT.PUSH.AXLE.0.5IN 5 532 43 55-78 2 SCREW. 5/16-24 X 2.00"HHCS 6 532 15 04-06 2 BOLT.ENG. 3/8-16 X 1.280 7 532 19 17-30 3 NUT.HEX.FLANGE.1/4-20.CTR.LOCK 8 872 11 04-07 3 BOLT.RDHD.SQNK.1/4-20 UNC X 5/8 9 532 44 29-42 1 BAR.
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) AUGER ASSEMBLY 2 3 1 10 11 4 14 7 56 13 9 1 12 8 9 11 12 5 5 4 13 6 10 11 SSST-Auger asm_1 7 KEY NO. PART NO. QTY 1 DESCRIPTION 1 872 11 04-07 12 BOLT.CARRIAGE 2 532 43 76-20 1 PIN.ROLL.3/16 X 1-1/4 3 532 19 96-87 1 BOLT.1/4-20.1.50" 4 532 43 76-18 2 PLATE.CENTER.BLADE 5 532 13 20-04 13 HEX.NUT.1/4-20 NYLON LOCKING 6 819 09 10-16 8 WASHER 9/32 X 5/8 X 16 GA. 7 532 44 27-59 2 BLADE.
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) HANDLE ASSEMBLY 1 2 5 4 3 5 6 SSST-Handle asm_1 KEY NO. PART NO. QTY DESCRIPTION 1 532 43 76-47 1 BAIL.HANDLE.PAINT.MS421 2 532 44 46-41 1 HANDLE.PNT.UPPER.SSST 3 532 43 48-06 1 CABLE.CLUTCH.ASM 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.
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) DRIVE ASSEMBLY 1 3 7 4 2 5 8 6 11 10 9 12 SSST-Drive asm_3 KEY NO. PART NO. 13 QTY DESCRIPTION 1 532 43 48-60 1 SPACER.ENGINE.CRANK 2 532 43 45-02 1 KEEPER.ENGINE.BELT 3 532 42 64-90 1 PULLEY.ENG.TRACTION.3/4 4 532 85 10-74 1 WASHER.HARDEN 5 532 43 72-61 1 BELT-V.TRACTION 6 532 43 08-17 1 SCREW.CAP.SCHD.3/8-24 X 1.25 7 532 43 48-59 1 SPRING.IDLER.PULLEY.RETURN 8 532 43 76-09 1 ARM.IDLER.PNT.
SERVICE NOTES 29
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) ENGINE, LCT COMPLETE ENGINE-444168,444169,444170,444171 56 37 36 27 57 30 34 49 31 29A 62 47 38 39 10 10A 44 22A 22 53* 52* 40 41 *Included with part# 40 50 21 23 65 26 26A 48 20 20A 28 46 11 8 6 46A 19 18 3 Electric Start Only 30 17
REPAIR PARTS SNOW THROWER - - MODEL NUMBER MC621 (96182000501) ENGINE, LCT COMPLETE ENGINE-444168,444169,444170,444171 KEY PART NO. NO. 3 6 8 444277 437122 437123 10 10A 437124 437125 11 17 424954 436967 18 19 20 436968 424968 424971 20A 429230 21 22 437119 424975 22A 429596 23 26 420580 429235 26A 420585 KEY PART NO. NO.
LIMITED WARRANTY The Manufacturer warrants to the original consumer purchaser that this product as manufactured is free from defects in materials and workmanship. For a period of two (2) years from date of purchase by the original consumer purchaser, we will repair or replace, at our option, without charge for parts or labor incurred in replacing parts, any part which we find to be defective due to materials or workmanship. This Warranty is subject to the following limitations and exclusions. 1.
