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Toro
Gas Walk-Behind Mower

Model # 20073 Official Toro lawn mower

Here are the diagrams and repair parts for Official Toro 20073 lawn mower, as well as links to manuals and error code tables, if available.

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Owner’s manual
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Model diagram and schematic

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ALL PARTS
Showing 10 of 230 parts  |
Lawn Mower Grass Bag Frame 108-9785-03
#2

Rear bag assembly diagram

Lawn mower grass bag frame

Part #108-9785-03

$74.02 | 
6% OFF Phone Price : $79.02
In Stock
Lawn Mower Ground Drive Belt 91-2258
Lawn mower ground drive belt

Part #91-2258

This item is not returnable

Get free shipping with Automatic Reorder

$28.81 | 
15% OFF Phone Price : $33.81
In Stock
Ring-klip 65-2720
Ring-klip

Part #65-2720

This item is not returnable
$2.16
In Stock
Torsion Spring 104-8690
#9

Handle assembly diagram

Torsion spring

Part #104-8690

Replaced by #136-7166

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Manufacturer substitution
This part replaces 104-8690. Substitute parts can look different from the original.
This item is not returnable
$4.17
In Stock
Lawn Mower Blade Adapter With Pulley 106-3987
#5

Engine & blade assembly diagram

Lawn mower blade adapter with pulley

Part #106-3987

Get free shipping with Automatic Reorder

$32.53
In Stock
Washer 110-7466
#4

Front axle assembly diagram

Washer

Part #110-7466

$7.98 | 
11% OFF Phone Price : $8.98
In Stock
Groove Pin 105-6817
#2

Transmission assembly diagram

Groove pin

Part #105-6817

This item is not returnable
$5.51
In Stock
Baffle 104-8694-03
#3

Deck/side chute/rear door diagram

Baffle

Part #104-8694-03

$62.91
In Stock
Chute Disc 105-3028
#12

Deck/side chute/rear door diagram

Chute disc

Part #105-3028

$18.71
In Stock
Lawn Mower Transmission Case, Upper 104-8674
#9

Transmission assembly diagram

Lawn mower transmission case, upper

Part #104-8674

$20.74
In Stock

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Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

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Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

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Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

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Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

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Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

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Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

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Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

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Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

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How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

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Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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Introducing new technical repair content that we’re developing for the Sears Technical Institute

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