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Sears
Lawn & Garden Engine

Model # 550E79 Official Sears diesel engine

Here are the diagrams and repair parts for Official Sears 550E79 diesel engine, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 371 parts  |
Switch Lever Sub-assy Consisting Of Item-nos. 31-34 106414BV
#31

Flange diagram

Switch lever sub-assy consisting of item-nos. 31-34

Part #106414BV

The manufacturer no longer makes this part, and there's no substitute part

Grooved Ball Bearing 6301 50014500
#21

Flange diagram

Grooved ball bearing 6301

Part #50014500

The manufacturer no longer makes this part, and there's no substitute part

Fuel Tank Sub-assy.capac.5ltrs With Cap Screw Item No. 2 169201V
#1B

Fuel tank diagram

Fuel tank sub-assy.capac.5ltrs with cap screw item no. 2

Part #169201V

The manufacturer no longer makes this part, and there's no substitute part

Protecting Tube 280901A
#11A

Cam shaft diagram

Protecting tube

Part #280901A

The manufacturer no longer makes this part, and there's no substitute part

Instrument Panel 287401
#10

Starter diagram

Instrument panel

Part #287401

The manufacturer no longer makes this part, and there's no substitute part

Stud M8x25 50038200
#8

Dynamo starter diagram

Stud m8x25

Part #50038200

The manufacturer no longer makes this part, and there's no substitute part

Crank Jaw 167107A
#23A

Starting handel diagram

Crank jaw

Part #167107A

The manufacturer no longer makes this part, and there's no substitute part

Fuel Tank Sub-assy.capac.9ltrs With Cap Screw Item No. 2 279201V
#1H

Fuel tank diagram

Fuel tank sub-assy.capac.9ltrs with cap screw item no. 2

Part #279201V

The manufacturer no longer makes this part, and there's no substitute part

Console With Strap Sub-assy (suitable When Flange 169601 Is Mounted) Tank Capacity 5ltrs 1610108AU
#16B

Fuel tank diagram

Console with strap sub-assy (suitable when flange 169601 is mounted) tank capacity 5ltrs

Part #1610108AU

The manufacturer no longer makes this part, and there's no substitute part

Threaded Pin M8x1 A2.185
#21

Starting handel diagram

Threaded pin m8x1

Part #A2.185

The manufacturer no longer makes this part, and there's no substitute part

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 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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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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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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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 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…

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

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

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Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

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Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your lawn & garden engines

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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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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What are the main components of a lawn mower?

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