Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Sears
Lawn & Garden Engine

Model # 550E785 Official Sears diesel engine

Here are the diagrams and repair parts for Official Sears 550E785 diesel engine, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 371 parts  |
Joint Washer 40003000
#31

Cam shaft diagram

Joint washer

Part #40003000

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

Allen Screw 50053800
Allen screw

Part #50053800

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

Pin 10,5 50059300
#42

Flange diagram

Pin 10,5

Part #50059300

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

Adjusting Plate 106409
#39

Flange diagram

Adjusting plate

Part #106409

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

Allen Screw M10x25 50053900
#16

Dynamo starter diagram

Allen screw m10x25

Part #50053900

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

Strap (for Item No. 30 A And 30 E) 40029400
#30D

Fuel tank diagram

Strap (for item no. 30 a and 30 e)

Part #40029400

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

Disconnector Shaft 166402B
#27

Flange diagram

Disconnector shaft

Part #166402B

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

Strap Exhaust 40029600
#29A

Fuel tank diagram

Strap exhaust

Part #40029600

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

Rubber Bed Plate 1610104
#17

Fuel tank diagram

Rubber bed plate

Part #1610104

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

Connecting Plate 310120
#41

Fuel tank diagram

Connecting plate

Part #310120

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

Symptoms for gas ranges

Why isn't my range's gas burner heating properly?

Main causes: gas supply problem, faulty pressure regulator, clogs in burner or orifice, control system failure, faulty t…

Read more

Why won't my range's gas burner spark or ignite?

Main causes: burner igniter switch failure, bad spark module, dirty or damaged spark electrode, wiring failure…

Read more

Repair guides for gas ranges

How to replace oven door hinges on a gas range

How to replace oven door hinges on a gas range

See how to replace the oven door hinges on a gas range yourself, in just 30 minutes.…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a range spark igniter switch

How to replace a range spark igniter switch

Follow these steps to replace the spark igniter switch—sometimes called a burner switch or spark switch—on a gas or dual…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a gas range oven control board

How to replace a gas range oven control board

These step-by-step instructions explain how to replace an oven control board on a gas range…

Read more
Repair difficulty
Time required
 15 minutes or less

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

View all
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.…

Read more
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.…

Read more

Parts & More