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Snapper
Gas Walk-Behind Mower

Model # SPA521-SERIES 3 Official Snapper mower

Here are the diagrams and repair parts for Official Snapper SPA521-SERIES-3 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.

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 310 parts  |
Filter 7014359
#8

Fuel tank diagram

Filter

Part #7014359

Replaced by #394358S

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Manufacturer substitution
This part replaces 7014359. Substitute parts can look different from the original.
BEST SELLER
$6.91 | 
13% OFF Phone Price : $7.91
In Stock
Hose 7076272
#11

Fuel tank diagram

Hose

Part #7076272

Replaced by #791766

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Manufacturer substitution
This part replaces 7076272. Substitute parts can look different from the original.
BEST SELLER
$9.31 | 
10% OFF Phone Price : $10.31
In Stock
Hose 7032956
#9

Fuel tank diagram

Hose

Part #7032956

Replaced by #791766

?
Manufacturer substitution
This part replaces 7032956. Substitute parts can look different from the original.
BEST SELLER
$9.31 | 
10% OFF Phone Price : $10.31
In Stock
Fln 5/16-18 7091601
#36

36" mower deck (adjustable height) diagram

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
In Stock
Fw, .28x.63x 7091294
#4

Oil tank diagram

Fw, .28x.63x

Part #7091294

Replaced by #703332

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Manufacturer substitution
This part replaces 7091294. Substitute parts can look different from the original.
This item is not returnable
$7.09 | 
12% OFF Phone Price : $8.09
In Stock
Hln 10 7091290
#5

Fuel tank diagram

Hln 10

Part #7091290

Replaced by #703412

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Manufacturer substitution
This part replaces 7091290. Substitute parts can look different from the original.
This item is not returnable
$7.09 | 
12% OFF Phone Price : $8.09
In Stock
Fluted Knob 7023735
Fluted knob

Part #7023735

Replaced by #703065

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Manufacturer substitution
This part replaces 7023735. Substitute parts can look different from the original.
This item is not returnable
$11.89 | 
14% OFF Phone Price : $13.89
In Stock
Cotter Pin 7091313
Cotter pin

Part #7091313

Replaced by #704058

?
Manufacturer substitution
This part replaces 7091313. Substitute parts can look different from the original.
This item is not returnable
$6.23
In Stock
Hcln 3/8 7091585
Hcln 3/8

Part #7091585

Replaced by #703347

?
Manufacturer substitution
This part replaces 7091585. Substitute parts can look different from the original.
This item is not returnable
$8.69
In Stock
Spring 7029139
#12

Loop handle/control series 3 diagram

Spring

Part #7029139

Replaced by #7029139YP

?
Manufacturer substitution
This part replaces 7029139. Substitute parts can look different from the original.
$12.94
In Stock

Symptoms for gas walk-behind mowers

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

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

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

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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 run rough?

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

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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 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

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 60 minutes or less
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How to replace a lawn mower ignition coil on a flathead engine

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Time required
 30 minutes or less

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