MTD Model 91M 4 HP 20" Mulching Mower Parts Diagram and List
Diagram Overview
This document presents an exploded view diagram and parts list for the MTD Model 91M 4 HP 20-inch mulching lawn mower. The diagram illustrates the assembly of the mower, showing components such as the handle assembly, engine, cutting deck, wheels, and height adjustment mechanisms. The accompanying list provides index numbers, part numbers, and descriptions for each component, aiding in identification for maintenance or repair.
Parts List
| INDEX NO. | PART NO. | DESCRIPTION |
|---|---|---|
| 1 | 017681 | Deck - 20" Mulcher |
| 2 | 030189 | Blade - 20" Mulcher |
| 3 | 052209 | Cable - Engine/Blade Control (Snap-In Type) |
| 4 | 052217 | Control - Throttle |
| 5 | 071563 | Handle - Lower |
| 6 | 072710 | Handle - Upper Coated |
| 7 | 106336 | Washer - Blade Adapter |
| 8 | 106914 | Clip Trailing Shield |
| 9 | 107086 | Handle Bracket - R.H. |
| 10 | 107094 | Handle Bracket - L.H. |
| 11 | 107912 | Bail - Engine/Blade Control |
| 12 | 110064 | Bolt Cap - Plastic |
| 13 | 110379 | Cable Tie |
| 14 | 111559 | Plastic Tip - Setting Lever |
| 15 | 111591 | Trailing Shield - Plastic |
| 16 | 133231 | Blade Adapter |
| 17 | 143115 | Decal - Danger |
| 18 | 144899 | Decal - Starting Instructions |
| 19 | 150201 | Washer - Curved 5/16" |
| 20 | 150276 | Woodruff Key No. 6 |
| 21 | 150623 | Screw - Self Tap #10x5/8 |
| 22 | 151555 | Washer - 1/4 |
| 23 | 113589 | Wing Nut 5/16-18 |
| 24 | 151936 | Bolt- Curved Head 5/16-18 x 2-1/4 |
| 25 | 152074 | Rope Stop |
| 26 | 152371 | Rope Guide |
| 27 | 153650 | Shoulder Bolt - Height Adjuster |
| 28 | 153874 | Bolt 1/4-20 x 2-1/4 Hex |
| 29 | 157420 | Wheel Bolt |
| 30 | 157552 | Clamp - Cable |
| 31 | 162024 | Bolt - Blade 3/8-24 x 1-1/4 Gr. 8 |
| 32 | 178475 | Baffle Front and Rear |
| 33 | 310045 | Nut 5/16-18 |
| 34 | 457168 | Bolt-3/8-16 x 7/8 TDFM |
| 35 | 428664 | Back Plate - Height Adjuster R.H. Front L.H. Rear |
| 36 | 428714 | Black Plate - Height Adjuster L.H. Front R.H. Rear |
| 37 | 451492 | Nut - 3/8-16 Toplock Flange |
| 38 | 457499 | Bolt - 1/4-20 x 1/2 Thread Forming |
| 39 | 462093 | Washer - 1/4 |
| 40 | 452318 | Nut #10-24 Hex Nylon Insert |
| 41 | 458687 | Bolt - #10-24 x 1/2 |
| 42 | 498634 | Wheel - 8 x 1.75 Plastic |
| 43 | 715011 | Hairpin Cotter |
| 44 | 715037 | Nut - 1/4-20 Keps |
| 45 | 715045 | Bolt 1/4-20 x 3/4 |
| 46 | 715508 | Locknut 1/4-20 |
| 47 | 715607 | Washer - Belleville |
| 48 | 776500 | Setting Lever - Height Adjuster |
| 49 | 777862 | Wheel Lever - Height Adjuster |
| 50 | 001206 | Decal - Blade Warning |
Notes
NOTE: Parts are right or left hand as viewed from operator position.
Specifications subject to change without prior notice.
