Snapper
Gas Walk-Behind Mower

Model #7800172 Snapper lawn mower

Here are the repair parts and diagrams for your Snapper 7800172 lawn mower. 

The diagram(s) below can help you find the right part.  If you’d like help, we invite you to call our customer service number at the top of the page, or click chat.

On this page, you can also find any manuals, installation guides and error code tables associated with this model.

For advice on diagnosing problems with appliances, lawn & garden equipment and other products, check out the videos, repair guides and articles in our DIY section.

Showing 10 of 658 parts

Wheel Arm

#8

Wheel brackets/latches (push) Diagram

Wheel arm

Part #7033775
This item is not returnable

$6.18

In Stock

Control Panel

#18B

Handles/controls Diagram

Control panel

Part #7073826

$19.20

In Stock

Weld

#3

Grass bag components Diagram

Weld

Part #7042489

$18.96

In Stock

Bracket

#15

Handles/controls Diagram

Bracket

Part #7073822YP
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  7073822
This part replaces 7073822

$11.08

In Stock

Lawn & Garden Equipment Nut

#26

Handles/controls Diagram

Lawn & garden equipment nut

Part #703164
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  7091067
This part replaces 7091067
This item is not returnable

$2.95

In Stock

Housing

#29

Transmission (differential) Diagram

Housing

Part #7029033YP
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  7029033
This part replaces 7029033

$20.24

In Stock

Panel

#18

Handles/controls Diagram

Panel

Part #7074140YP
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  7074140
This part replaces 7074140

$65.14

In Stock

Clamp

#63

Handles/controls Diagram

Clamp

Part #7023153YP
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  7023153
This part replaces 7023153
This item is not returnable

$2.47

In Stock

Lawn Mower Drive Disc

#48

Drive system self-propelled Diagram

Lawn mower drive disc

Part #7073528YP
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  7061275
This part replaces 7061275

$31.22

In Stock

Lawn & Garden Equipment Cap Screw

#21

Handles/controls Diagram

Lawn & garden equipment cap screw

Part #703408
?This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including  7091904
This part replaces 7091904
This item is not returnable

$3.48

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: uneven wheel height settings, damaged wheel, dull or damaged cutting blade
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: engine needs tune up, dirty or clogged carburetor, damaged flywheel key
Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, bad ignition coil

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.

March 1, 2016
By Lyle Weischwill
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 cable if it's broken or frozen up inside the sheath.

Repair difficulty
Time required
 60 minutes or less
April 1, 2013
By Lyle Weischwill
How to replace a lawn mower wheel

Learn how replace a damaged wheel on a walk-behind lawn mower—it's a quick, easy fix.

Repair difficulty
Time required
 15 minutes or less
April 1, 2013
By Lyle Weischwill
How to replace a lawn mower safety switch

The safety switch stops the engine when you release the lever on the handle. This repair guide explains how to replace it if it's not working correctly.

Repair difficulty
Time required
 30 minutes or less

Articles and videos common to all walk-behind mowers

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

October 1, 2019

Types of walk-behind mower blades video

By Sears PartsDirect staff

Learn about the different kinds of mower blades and how to maintain them.