MTD 663 manual Models 643

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Models 643 & 663

26

27

36

28

29

1

30

2

3

4

16

11

12

9

10

8

4 7

1915

16

16

19

16

21

22

14

23

17

 

 

18

20

24

IMPORTANT: For a proper working machine, use Factory Approved Parts.

V-BELTSare specially designed to engage and disengage safely. A substitute (non OEM) V-Belt can be dangerous by not disengaging completely

6 5

13

31 33

25

34

32

35

22

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Contents OPERATOR’S Manual Table of Contents Important Safe Operation Practices TrainingMaintenance and Storage Unpacking AssemblyAssembling Your Snow Thrower Loose PartsKnow Your Snow Thrower Operating Your Snow Thrower To Engage Augers To Stop EngineTo Engage Drive Recoil StarterDrift Cutters If Equipped Chute Clean-Out ToolOperating Tips Making Adjustments Traction Control and Shift LeverAuger Control Shift Rod AdjustmentChute Assembly Skid ShoesMaintaining Your Snow Thrower LubricationEngine Belt Removal And ReplacementServicing Your Snow Thrower AugersReplacing Friction Wheel Rubber Drive BeltOff-Season Storage Trouble Shooting Trouble Possible Causes Corrective ActionModels 643 Part Description70 73 429 731-1300B Lower Chute Models 643 Models 643 Models 643 Models 643 2615 Drive Clutch Cable Auger Clutch Models 643 Page Page MANUFACTURER’S Limited Warranty for