Murray
Gas Walk-Behind Mower

Model # 7800240 (NM2255) Official Murray lawn mower

Here are the diagrams and repair parts for Official Murray 7800240-NM2255 lawn mower, as well as links to manuals and error code tables, if available.

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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.

Model diagram and schematic

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ALL PARTS
Showing 10 of 159 parts  |

Pushnut-1/4 7091020YP
Pushnut-1/4

Part #7091020YP

Replaced by #704005

?
Manufacturer substitution
This part replaces 7091020YP. Substitute parts can look different from the original.
This item is not returnable
$7.29
12% OFF Phone Price : $8.29
In Stock
Bolt 7090001YP
Bolt

Part #7090001YP

Replaced by #703185

?
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
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
Retaining Ring 7014341YP
Retaining ring

Part #7014341YP

Replaced by #703976

?
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
Lawn & Garden Equipment Wing Nut 071294MA
#11

Handles & controls - push diagram

Lawn & garden equipment wing nut

Part #071294MA

Replaced by #703065

?
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
Decal Cpsc B 7102286YP

#NI05

All parts diagram

Decal cpsc b

Part #7102286YP

In Stock
Nut 3/8-16 B 7900053MA
Nut 3/8-16 b

Part #7900053MA

This item is not returnable
In Stock
Decal Murray 7101901YP
#5

Decals diagram

Decal murray

Part #7101901YP

In Stock
Hubcap-round 7101351MA
Hubcap-round

Part #7101351MA

In Stock

Symptoms for gas walk-behind mowers

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

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

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

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

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

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 drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 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.

Tapping into a new feature in the Search Bar on Sears PartsDirect

Tapping into a new feature in the Search Bar on Sears PartsDirect

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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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