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Murray
Gas Walk-Behind Mower

Model # 20456X9A Official Murray lawn mower

Here are the diagrams and repair parts for Official Murray 20456X9A lawn mower, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

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

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

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 51 parts  |
Whl 8x1.75 D 672080
#28

Engine diagram

Whl 8x1.75 d

Part #672080

Replaced by #336545MA

?
Manufacturer substitution
This part replaces 672080. Substitute parts can look different from the original.
$44.59 | 
10% OFF Phone Price : $49.59
In Stock
Lock Nut 15X84
#13

Engine diagram

Lock nut

Part #15X84

Replaced by #703893

?
Manufacturer substitution
This part replaces 15X84. Substitute parts can look different from the original.
This item is not returnable
$11.29 | 
15% OFF Phone Price : $13.29
In Stock
Bell Washer 17X137
#14

Engine diagram

Bell washer

Part #17X137

Replaced by #17X137MA

?
Manufacturer substitution
This part replaces 17X137. Substitute parts can look different from the original.
$9.57
In Stock
Push Nut 28X49
#5

Engine diagram

Push nut

Part #28X49

Replaced by #28X49MA

?
Manufacturer substitution
This part replaces 28X49. Substitute parts can look different from the original.
This item is not returnable
$7.11
In Stock
Bolt 2X16
#51

Engine diagram

Bolt

Part #2X16

Replaced by #2X16MA

?
Manufacturer substitution
This part replaces 2X16. Substitute parts can look different from the original.
This item is not returnable
$7.06
In Stock
Tapping Screw 26X245
#31

Engine diagram

Tapping screw

Part #26X245

Replaced by #26X245MA

?
Manufacturer substitution
This part replaces 26X245. Substitute parts can look different from the original.
This item is not returnable
$6.74 | 
13% OFF Phone Price : $7.74
In Stock
Rope Guide 71530
#12

Handle diagram

Rope guide

Part #71530

Replaced by #071530MA

?
Manufacturer substitution
This part replaces 71530. Substitute parts can look different from the original.
$10.49
In Stock
Door 672601A
#7

Engine diagram

Door

Part #672601A

Replaced by #672601MA

?
Manufacturer substitution
This part replaces 672601A. Substitute parts can look different from the original.
$112.52
In Stock
Screw 4X21
#11

Engine diagram

Screw

Part #4X21

Replaced by #4X21MA

?
Manufacturer substitution
This part replaces 4X21. Substitute parts can look different from the original.
This item is not returnable
$6.86
In Stock
Wire Tie Reu 71372
#15

Handle diagram

Wire tie reu

Part #71372

Replaced by #71372MA

?
Manufacturer substitution
This part replaces 71372. Substitute parts can look different from the original.
$7.77
In Stock

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. …

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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

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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