Murray
Gas Walk-Behind Mower

Model # 7800257 Official Murray lawn mower

Here are the diagrams and repair parts for Official Murray 7800257 lawn mower, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 159 parts  |

Hln-1/4c-bz 7076978SM
Hln-1/4c-bz

Part #7076978SM

Replaced by #703232

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Manufacturer substitution
This part replaces 7076978SM. Substitute parts can look different from the original.
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This item is not returnable
$6.24
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Pushnut-1/4 7091020YP
Pushnut-1/4

Part #7091020YP

Replaced by #704005

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Manufacturer substitution
This part replaces 7091020YP. Substitute parts can look different from the original.
This item is not returnable
$7.29
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In Stock
Lawn & Garden Equipment Wing Nut 071294MA
#11

Handles & controls - push diagram

Lawn & garden equipment wing nut

Part #071294MA

Replaced by #703065

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Manufacturer substitution
This part replaces 071294MA. Substitute parts can look different from the original.
This item is not returnable
$11.89
14% OFF Phone Price : $13.89
In Stock
Lawn Mower Handle Knob 7035744YP
Lawn mower handle knob

Part #7035744YP

Replaced by #703065

?
Manufacturer substitution
This part replaces 7035744YP. Substitute parts can look different from the original.
This item is not returnable
$11.89
14% OFF Phone Price : $13.89
In Stock
Bolt 7090001YP
Bolt

Part #7090001YP

Replaced by #703185

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Manufacturer substitution
This part replaces 7090001YP. Substitute parts can look different from the original.
This item is not returnable
$5.63
15% OFF Phone Price : $6.63
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Retaining Ring 7014341YP
Retaining ring

Part #7014341YP

Replaced by #703976

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Manufacturer substitution
This part replaces 7014341YP. Substitute parts can look different from the original.
This item is not returnable
$7.09
12% OFF Phone Price : $8.09
In Stock
Bolt 1931337SM
Bolt

Part #1931337SM

Replaced by #703296

?
Manufacturer substitution
This part replaces 1931337SM. Substitute parts can look different from the original.
This item is not returnable
In Stock
Center Lock Nut 015X88MA
Center lock nut

Part #015X88MA

Replaced by #704067

?
Manufacturer substitution
This part replaces 015X88MA. Substitute parts can look different from the original.
This item is not returnable
In Stock
Lawn Mower Engine Pulley 7100763MA
#6

Engine/blade/front cover diagram

Lawn mower engine pulley

Part #7100763MA

In Stock
Walk-behind Lawn Mower Engine Decal 7102272YP
#14

Decals diagram

Walk-behind lawn mower engine decal

Part #7102272YP

In Stock

Symptoms for gas walk-behind mowers

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

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

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

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

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

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

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

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.

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…

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. …

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…

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.

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.…

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

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

Learn about Sears Technical Institute and the advanced technical content being developed for aspiring appliance techs.…

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Top questions about Sears and Sears PartsDirect

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