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 13 parts  |

Lawn & Garden Equipment Engine Air Filter (replaces 951-14262) 951-10794
#NI01

Tiller diagram

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

Part #951-10794

BEST SELLER
$12.93
14% OFF Was : $15.00
In Stock
Lawn Mower Handle Knob (replaces 01000382, 113589, 720-04072, 720-04125) 720-04072A
#NI08

Tiller diagram

Lawn mower handle knob (replaces 01000382, 113589, 720-04072, 720-04125)

Part #720-04072A

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This item is not returnable
$5.77
48% OFF MSRP : $11.00
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Tiller Drive Belt (replaces 1916657) 954-04090
#NI02

Tiller diagram

Tiller drive belt (replaces 1916657)

Part #954-04090

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Get free shipping with Automatic Reorder

$25.18
17% OFF Phone Price : $30.18
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Tiller Drive Belt (replaces 1916658) 954-04091
#NI03

Tiller diagram

Tiller drive belt (replaces 1916658)

Part #954-04091

This item is not returnable

Get free shipping with Automatic Reorder

$27.89
15% OFF Phone Price : $32.89
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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
$27.80
15% OFF Phone Price : $32.80
In Stock
Grip-handle 720-05023A
#NI06

Tiller diagram

Grip-handle

Part #720-05023A

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
10% OFF Phone Price : $51.56
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Tiller Wheel Assembly 634P06425
#NI14

Tiller diagram

Tiller wheel assembly

Part #634P06425

$166.58
12% OFF MSRP : $190.00
In Stock
Cable-revers 946-04414A
#NI05

Tiller diagram

Cable-revers

Part #946-04414A

In Stock
Bolo Tine, 10-in 742-04227
Bolo tine, 10-in

Part #742-04227

Replaced by #742-04227-0637

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Manufacturer substitution
This part replaces 742-04227. Substitute parts can look different from the original.
$25.06
17% OFF Phone Price : $30.06
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Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

Main causes: clutch cable problems, faulty transmission…

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

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

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

Main causes: broken shaft clevis pins, transmission failure…

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

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

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.

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…

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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How to enjoy all the online benefits we offer on our Sears PartsDirect website

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Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

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