Tecumseh
Lawn & Garden Engine

Model # TYPE 642-20 Official Tecumseh engine

Here are the diagrams and repair parts for Official Tecumseh TYPE-642-20 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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Showing 10 of 123 parts  |

O-ring 631028
#25

Carburetor no. 631895 diagram

O-ring

Part #631028

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

/carb Float 631023
#14

Carburetor no. 631895 diagram

/carb float

Part #631023

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

Seal 510105
#26

Basic engine diagram

Seal

Part #510105

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

Spring 510109
#28

Basic engine diagram

Spring

Part #510109

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

Dog Sprng Rh 590412
#5

Rewind starter no. 590420 diagram

Dog sprng rh

Part #590412

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

Clip 631022
#13

Carburetor no. 631895 diagram

Clip

Part #631022

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

Retainer 510106
#27

Basic engine diagram

Retainer

Part #510106

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

Nut 650390
#50

Basic engine diagram

Nut

Part #650390

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

Coil 30560A
#11

Magneto no. 610832a diagram

Coil

Part #30560A

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

Carb. Stud 650794
#25

Basic engine diagram

Carb. stud

Part #650794

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

Symptoms for band saws

Choose a symptom to see related band saw repairs.

Main causes: damaged rubber tire, worn wheel bearings, loose blade tension, dull saw blade…

Main causes: dull blade, using the wrong type of blade, feeding work piece to quickly, loose blade tension…

Main causes: angle indicator needs adjustment, dull blade…

Main causes: dull blade, improper feeding, loose blade tension, not using a work piece guide…

Main causes: broken saw blade, bad drive belt, damaged rubber tire…

Main causes: dull blade, using the wrong type of blade, weak drive motor…

Main causes: lack of electrical power, broken power cord, bad on/off switch, faulty drive motor…

Repair guides for band saws

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

How to replace a band saw on-off switch

How to replace a band saw on-off switch

If the switch won't turn the band saw on or off, it could be defective. Replace the switch, using these steps.…

Repair difficulty
Time required
 15 minutes or less
How to replace a band saw drive belt

How to replace a band saw drive belt

If the motor runs but the blade doesn't move, it could be that the drive belt is broken. Here's how to replace it.…

Repair difficulty
Time required
 15 minutes or less
How to replace a band saw blade

How to replace a band saw blade

If the saw blade is dull or damaged and isn't cutting cleanly, replace the blade following these steps.…

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 band saw.

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.…