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 Box 40025300
#6

Starter diagram

Switch box

Part #40025300

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

Allen Screw M6x12 50050600
#8

Additional oil tank diagram

Allen screw m6x12

Part #50050600

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

Hexagon Nut 50022600
#30

Dynamo starter diagram

Hexagon nut

Part #50022600

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

Clutch Shaft 276403
#46

Flange diagram

Clutch shaft

Part #276403

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

Cover 2711202
#7A

Additional oil tank diagram

Cover

Part #2711202

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

Pushrod With Shouldered Socket 160907AU
#10

Cam shaft diagram

Pushrod with shouldered socket

Part #160907AU

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

Hexagon Screw 50031900
Hexagon screw

Part #50031900

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

Intermediate Plate 167111A
#30

Starting handel diagram

Intermediate plate

Part #167111A

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

1:1,5 (fast) 40039500
#60M

Flange diagram

1:1,5 (fast)

Part #40039500

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

Symptoms for gas snowblowers

Choose a symptom to see related snowblower repairs.

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b…

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems…

Main causes: dirty carburetor, stale fuel…

Main causes: punctured tire, damaged rim…

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets…

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect…

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground…

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly…

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, …

Repair guides for gas snowblowers

These step-by-step repair guides will help you safely fix what’s broken on your snowblower.

How to adjust snowblower engine valve lash

How to adjust snowblower engine valve lash

Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly.…

Repair difficulty
Time required
 15 minutes or less
How to adjust snowblower skid shoes

How to adjust snowblower skid shoes

To prevent snowblower auger and shave plate damage, adjust the skid shoes regularly to keep the shave plate ¼-inch high.…

Repair difficulty
Time required
 15 minutes or less
How to replace a snowblower shave plate

How to replace a snowblower shave plate

Follow the 7 easy steps in this repair guide/video to replace a worn out shave plate on your snowblower.…

Repair difficulty
Time required
 15 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 snowblower.

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.…

What are the main components of a lawn mower?

What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…