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Snapper
Gas Walk-Behind Mower

Model # 7800170 Official Snapper lawn mower

Here are the diagrams and repair parts for Official Snapper 7800170 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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Showing 10 of 163 parts  |
Hln, 1/4c Bz 7076978
Hln, 1/4c bz

Part #7076978

Replaced by #703232

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Manufacturer substitution
This part replaces 7076978. Substitute parts can look different from the original.
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This item is not returnable
$6.24 | 
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Nut 7091070
Nut

Part #7091070

Replaced by #703409

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Manufacturer substitution
This part replaces 7091070. Substitute parts can look different from the original.
$9.27 | 
10% OFF Phone Price : $10.27
In Stock
Fln 5/16-18 7091601
Fln 5/16-18

Part #7091601

Replaced by #703409

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Manufacturer substitution
This part replaces 7091601. Substitute parts can look different from the original.
$9.27 | 
10% OFF Phone Price : $10.27
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Blade 7100242
#10

Engine/blade diagram

Blade

Part #7100242

Replaced by #7100242AYP

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Manufacturer substitution
This part replaces 7100242. Substitute parts can look different from the original.

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$36.69 | 
14% OFF Phone Price : $42.69
In Stock
Hfln 3/8 7091619
#8

Rear deck brackets/idler arm diagram

Hfln 3/8

Part #7091619

Replaced by #703333

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Manufacturer substitution
This part replaces 7091619. Substitute parts can look different from the original.
This item is not returnable
$8.09 | 
11% OFF Phone Price : $9.09
In Stock
Fw, .406x1.5 7091331
#9

Rear deck brackets/idler arm diagram

Fw, .406x1.5

Part #7091331

Replaced by #703591

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Manufacturer substitution
This part replaces 7091331. Substitute parts can look different from the original.
$9.57
In Stock
Rhssnb, 5/16 7900015
#15

Guards/covers diagram

Rhssnb, 5/16

Part #7900015

Replaced by #7900015YP

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Manufacturer substitution
This part replaces 7900015. Substitute parts can look different from the original.
This item is not returnable
$7.37
In Stock
Blade Hub 7027423
#9

Engine/blade diagram

Blade hub

Part #7027423

Replaced by #7027423YP

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Manufacturer substitution
This part replaces 7027423. Substitute parts can look different from the original.
$28.37
In Stock
Wiring Harness 7100327
#30

Handles/controls diagram

Wiring harness

Part #7100327

Replaced by #7100327YP

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Manufacturer substitution
This part replaces 7100327. Substitute parts can look different from the original.
$73.84
In Stock
Pulley 7024228
#19

Bagging diagram

Pulley

Part #7024228

Replaced by #7024228SM

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Manufacturer substitution
This part replaces 7024228. Substitute parts can look different from the original.
This item is not returnable
$8.94
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 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 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 cut unevenly?

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

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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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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 vibrate a lot?

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

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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 rebuild a lawn mower carburetor

How to rebuild a lawn mower carburetor

The carburetor mixes air with fuel to drive the piston. Rebuild the carburetor if it's clogged or leaks.…

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Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower recoil starter on an OHV engine

How to replace a lawn mower recoil starter on an OHV engine

Replace the recoil starter if it doesn't move when you pull the starter rope.…

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower wheel

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.…

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Repair difficulty
Time required
 15 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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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.…

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Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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Types of walk-behind mower blades video

Types of walk-behind mower blades video

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

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