Gas Walk-Behind Mower

Model # 7800003 (S21) Official Snapper lawn mower

Here are the diagrams and repair parts for Official Snapper 7800003 (S21) lawn mower, as well as links to manuals and error code tables, if available.

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7800003 (S21) Walk-Behind Mowers
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
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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
Cap  E-start 7100330
#27

Handles/controls diagram

Cap e-start

Part #7100330

Replaced by #7100330YP

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Manufacturer substitution
This part replaces 7100330. Substitute parts can look different from the original.
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
In Stock
Grip, Height Latch 7100633
Grip, height latch

Part #7100633

Replaced by #7103793YP

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Manufacturer substitution
This part replaces 7100633. Substitute parts can look different from the original.
This item is not returnable
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
In Stock
Hcln, Large, 7090951
Hcln, large,

Part #7090951

Replaced by #704001

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Manufacturer substitution
This part replaces 7090951. Substitute parts can look different from the original.
This item is not returnable
In Stock
Cover 7100001
#2

Guards/covers diagram

Cover

Part #7100001

Replaced by #7100001YP

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Manufacturer substitution
This part replaces 7100001. Substitute parts can look different from the original.
In Stock
Pulley 7100437
#6

Engine/blade diagram

Pulley

Part #7100437

Replaced by #7100437YP

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Manufacturer substitution
This part replaces 7100437. Substitute parts can look different from the original.
In Stock
Hex Head Cap Screw 7900011
#26

Rear wheels (self-propelled) diagram

Hex head cap screw

Part #7900011

Replaced by #7900011MA

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Manufacturer substitution
This part replaces 7900011. Substitute parts can look different from the original.
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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 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.

The best time of day to mow grass (and when you should absolutely not)

The best time of day to mow grass (and when you should absolutely not)

Wondering when to mow your lawn for the best results? Timing matters more than you might think. Discover the best time o…

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.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

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