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MTD
Front-Tine Tiller

Model # 21AS144R799 Official MTD front-tine tiller

Here are the diagrams and repair parts for Official MTD 21AS144R799 front-tine tiller, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 127 parts  |
Screw 791-181012
#79

Engine parts diagram

Screw

Part #791-181012

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

Air Filter 791-182658
#32

Engine parts diagram

Air filter

Part #791-182658

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

Tube 791-182097
#28

Engine parts diagram

Tube

Part #791-182097

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

Cotter Pin 753-04057
#16

Cultivator assembly diagram

Cotter pin

Part #753-04057

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

Flex Shaft 753-04499
#9

Cultivator assembly diagram

Flex shaft

Part #753-04499

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

Wing Knob 791-182677
#10

Cultivator assembly diagram

Wing knob

Part #791-182677

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

Cyl Asm:ac 2 753-04816
#16

Engine parts diagram

Cyl asm:ac 2

Part #753-04816

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

Pal Nut 753-04288
#49

Engine parts diagram

Pal nut

Part #753-04288

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

Clutch Housing 753-05076
#64

Engine parts diagram

Clutch housing

Part #753-05076

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

Starter Assembly 753-05072
#52

Engine parts diagram

Starter assembly

Part #753-05072

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

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

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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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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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

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.…

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