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MTD
Rear-Tine Tiller

Model # 21D-65M8793 Official MTD rear tine gas tiller

Here are the diagrams and repair parts for Official MTD 21D-65M8793 rear tine gas tiller, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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Showing 10 of 10 parts  |
Kmart Lawn & Garden Equipment Engine Air Filter (replaces 951-14262) 951-10794
#NI01

Tiller diagram

Kmart lawn & garden equipment engine air filter (replaces 951-14262)

Part #951-10794

BEST SELLER
$12.58 | 
14% OFF Phone Price : $14.58
In Stock
Yard Machines Lawn Mower Handle Knob (replaces 01000382, 113589, 720-04072, 720-04125) 720-04072A
#NI08

Tiller diagram

Yard machines lawn mower handle knob (replaces 01000382, 113589, 720-04072, 720-04125)

Part #720-04072A

BEST SELLER
$9.33 | 
10% OFF Phone Price : $10.33
In Stock
Tiller Forward Drive Control Cable (replaces 946-04413) 946-04413A
#NI04

Tiller diagram

Tiller forward drive control cable (replaces 946-04413)

Part #946-04413A

$46.56 | 
11% OFF Phone Price : $52.56
In Stock
Lawn & Garden Equipment Engine Fuel Tank Cap 951-12535
#NI07

Tiller diagram

Lawn & garden equipment engine fuel tank cap

Part #951-12535

This item is not returnable
$31.09 | 
16% OFF Phone Price : $37.09
In Stock
Mtd Tiller Wheel Assembly 634P06425
#NI14

Tiller diagram

Mtd tiller wheel assembly

Part #634P06425

$166.58 | 
7% OFF Phone Price : $178.58
In Stock
Kmart Tiller Drive Belt (replaces 1916657) 954-04090
#NI02

Tiller diagram

Kmart tiller drive belt (replaces 1916657)

Part #954-04090

This item is not returnable

Get free shipping with Automatic Reorder

$25.18 | 
19% OFF Phone Price : $31.18
In Stock
Kmart Tiller Drive Belt (replaces 1916658) 954-04091
#NI03

Tiller diagram

Kmart tiller drive belt (replaces 1916658)

Part #954-04091

This item is not returnable

Get free shipping with Automatic Reorder

$27.89 | 
18% OFF Phone Price : $33.89
In Stock
Mtd Cable-revers 946-04414A
#NI05

Tiller diagram

Mtd cable-revers

Part #946-04414A

$52.49
In Stock
Mtd Grip-handle 720-05023A
#NI06

Tiller diagram

Mtd grip-handle

Part #720-05023A

$40.09
In Stock
N/P
#NI15

Tiller diagram

Part #N/P

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

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Why do my tiller's tines turn but the wheels don't?

Main causes: clutch cable problems, faulty transmission…

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Why does my tiller turn the soil poorly?

Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…

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Why won't my tillers wheels or tines turn?

Main causes: worn or broken drive belts, bad transmission, clutch cable problems…

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Why does my tiller's engine leak oil or gas?

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea…

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Why do my tiller's wheels turn but the tines don't?

Main causes: broken shaft clevis pins, transmission failure…

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Why does my tiller's engine run roughly or misfire?

Main causes: dirty carburetor, engine needs tune up, stale gas…

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Why won't my tiller's engine start?

Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…

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Most common repair guides to help fix your tillers

These step-by-step repair guides will help you safely fix what’s broken on your tiller.

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How to replace a tiller recoil starter

How to replace a tiller recoil starter

The recoil starter spins the engine when you pull the starter rope, and the rope retracts when released. If the recoil s…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your tillers

Use the advice and tips in these articles and videos to get the most out of your tiller.

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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A guide to garden tillers

A guide to garden tillers

Rear tine tiller or front tine tiller, what to know to help in choosing the correct one for your needs.…

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Tiller common questions

Tiller common questions

These frequently asked questions might help you figure out what's wrong with your garden tiller.…

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