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Husqvarna
Gas Walk-Behind Mower

Model # HU550FH-96143009605 Official Husqvarna gas lawn mower

Here are the diagrams and repair parts for Official Husqvarna HU550FH-96143009605 gas 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.

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 86 parts  |
Lawn Mower Lock Nut, 3/8-in (replaces 409149, 532409148) 532409149
#25

Engine/housing/handle diagram

Lawn mower lock nut, 3/8-in (replaces 409149, 532409148)

Part #532409149

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Lawn Mower Nut 532409148
#29

Drive control/gear case/wheels diagram

Lawn mower nut

Part #532409148

Replaced by #532409149

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Manufacturer substitution
This part replaces 532409148. Substitute parts can look different from the original.
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Craftsman Lawn Mower Grass Bag Frame (replaces 419951) 585054702
#57

Drive control/gear case/wheels diagram

Craftsman lawn mower grass bag frame (replaces 419951)

Part #585054702

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Lawn Mower Transmission Assembly 532424741
#36

Drive control/gear case/wheels diagram

Lawn mower transmission assembly

Part #532424741

Replaced by #589600601

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Manufacturer substitution
This part replaces 532424741. Substitute parts can look different from the original.
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Lawn Mower Bolt (replaces 191574) 532191574
#59

Engine/housing/handle diagram

Lawn mower bolt (replaces 191574)

Part #532191574

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Lawn Mower Height Adjuster Knob (replaces 701037, 701037x421) 532701037
Lawn mower height adjuster knob (replaces 701037, 701037x421)

Part #532701037

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Craftsman Lawn Mower Transmission Axle Pin (replaces 404845, 5324048-45) 532404845
#15

Drive control/gear case/wheels diagram

Craftsman lawn mower transmission axle pin (replaces 404845, 5324048-45)

Part #532404845

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Lawn Mower Height Adjuster, Left (replaces 408017, 409097, 409108, 438460, 532431143, 581497904) 581497907
#35

Drive control/gear case/wheels diagram

Lawn mower height adjuster, left (replaces 408017, 409097, 409108, 438460, 532431143, 581497904)

Part #581497907

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Lawn Mower Grass Bag 580947315
#54

Drive control/gear case/wheels diagram

Lawn mower grass bag

Part #580947315

Replaced by #580947302

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This part replaces 580947315. Substitute parts can look different from the original.
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Craftsman Lawn & Garden Equipment Bolt (replaces 17000510) 817000510
#53

Engine/housing/handle diagram

Craftsman lawn & garden equipment bolt (replaces 17000510)

Part #817000510

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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 vibrate a lot?

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

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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 run rough?

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

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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 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 stall?

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

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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....

Read more
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....

Read more
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

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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