Tecumseh
Lawn & Garden Engine

Model # TYPE 670-85A Official Tecumseh 2-cycle engine

Here are the diagrams and repair parts for Official Tecumseh TYPE-670-85A 2-cycle 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 122 parts  |

O-ring 631028
#7

Carburetor no. 631936 diagram

O-ring

Part #631028

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

Needl/seat 631021
#2

Carburetor no. 631936 diagram

Needl/seat

Part #631021

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

Spark Plug 34251
#16A

Basic engine diagram

Spark plug

Part #34251

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

Fuel Line 29774
#68

Basic engine diagram

Fuel line

Part #29774

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

Float 632019
#5

Carburetor no. 631936 diagram

Float

Part #632019

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

Seal 510105
#29

Basic engine diagram

Seal

Part #510105

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

Clip 631022
#3

Carburetor no. 631936 diagram

Clip

Part #631022

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

Washer 631183
#20

Carburetor no. 631936 diagram

Washer

Part #631183

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

Lawn & Garden Equipment Engine Crankshaft Seal Retainer 510106A
#30

Basic engine diagram

Lawn & garden equipment engine crankshaft seal retainer

Part #510106A

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

Fuel Fitting 631803
#4

Carburetor no. 631936 diagram

Fuel fitting

Part #631803

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

Symptoms for gas line trimmers

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Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings…

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Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank…

Repair guides for gas line trimmers

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

How to rebuild a line trimmer carburetor

How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow…

Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer carburetor

How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these …

Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer fuel line

How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yours…

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 grass line trimmer.

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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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