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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  |
Allen Screw 50049200
#49

Dynamo starter diagram

Allen screw

Part #50049200

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

Hexagon Nut 50022900
Hexagon nut

Part #50022900

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

Circlip 35x1,5 50021100
#49

Flange diagram

Circlip 35x1,5

Part #50021100

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

Intermediate Flange (for Flywheel 169501a And 169502a) 169601
#62

Flange diagram

Intermediate flange (for flywheel 169501a and 169502a)

Part #169601

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

Centering Flange 278701
#14A

Flange diagram

Centering flange

Part #278701

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

Supporter For Dynamo-starter 166201
#7

Dynamo starter diagram

Supporter for dynamo-starter

Part #166201

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

Reduction Gear 6,6:1 ) Type 40039200
#60J

Flange diagram

Reduction gear 6,6:1 ) type

Part #40039200

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

V-belt 10x670 50008400
#63

Dynamo starter diagram

V-belt 10x670

Part #50008400

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

Strap 40028900
#69

Dynamo starter diagram

Strap

Part #40028900

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

Fixing Clamps 289203
#39

Fuel tank diagram

Fixing clamps

Part #289203

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…

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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…

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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.…

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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…

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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…

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Repair difficulty
Time required
 15 minutes or less

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Top questions about Sears and Sears PartsDirect

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What are the main components of a lawn mower?

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