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Toro
Gas Walk-Behind Mower

Model # 20073A Official Toro lawn mower

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

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual
  View engine

Model diagram and schematic

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ALL PARTS
Showing 10 of 229 parts  |
Lawn Mower Washer 614426
Lawn mower washer

Part #614426

This item is not returnable
$4.31
In Stock
Gasket 105-6839
#11

Transmission assembly diagram

Gasket

Part #105-6839

This item is not returnable
$7.11
In Stock
Pinion Gear 105-3040
Pinion gear

Part #105-3040

This item is not returnable
$7.71
In Stock
Groove Pin 105-6817
#2

Transmission assembly diagram

Groove pin

Part #105-6817

This item is not returnable
$5.86
In Stock
Belt Cover 105-1835
#9

Engine & blade assembly diagram

Belt cover

Part #105-1835

$23.09
In Stock
Lawn Mower Transmission Case, Upper 104-8674
#9

Transmission assembly diagram

Lawn mower transmission case, upper

Part #104-8674

$22.06
In Stock
Screw 107-7461
#13:4

Deck/side chute/rear door diagram

Screw

Part #107-7461

This item is not returnable
$2.16
In Stock
Lawn Mower End Cap 112-6439
#6

Rear bag assembly diagram

Lawn mower end cap

Part #112-6439

This item is not returnable
$3.43
In Stock
Belt Cover 105-3005
#13

Front axle assembly diagram

Belt cover

Part #105-3005

$13.14
In Stock
Cap Screw 322-6
Cap screw

Part #322-6

This item is not returnable
$2.16
In Stock

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Symptoms for gas walk-behind mowers

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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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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. …

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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

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