Troybilt
Gas Line Trimmer

Model # TB70SS Official Troybilt trimmer

Here are the diagrams and repair parts for Official Troybilt TB70SS trimmer, 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 90 parts  |

Hose 791-683947B
#9

Engine diagram

Hose

Part #791-683947B

Replaced by #791-683974B

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Manufacturer substitution
This part replaces 791-683947B. Substitute parts can look different from the original.
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In Stock
Line Trimmer Handle 791-182167
#9

Boom and trimmer diagram

Line trimmer handle

Part #791-182167

In Stock
Rope Guide 753-1200
#25

Engine diagram

Rope guide

Part #753-1200

In Stock
Gearbox 791-180549
#20

Boom and trimmer diagram

Gearbox

Part #791-180549

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

Housing 753-04402
#31

Engine diagram

Housing

Part #753-04402

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

Ground Tab 791-611063
#42

Engine diagram

Ground tab

Part #791-611063

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

Piston Rod 753-04367
#53

Engine diagram

Piston rod

Part #753-04367

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

Carburetor 753-04318
#6

Engine diagram

Carburetor

Part #753-04318

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

Scr:10-9x.50 753-1202
#30

Engine diagram

Scr:10-9x.50

Part #753-1202

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

Guard 791-180548
#22

Boom and trimmer diagram

Guard

Part #791-180548

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

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…

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

Articles and videos for gas line trimmers

Use the advice and tips in these articles and videos to get the most out of your grass line trimmer.

Top 10 electric lawn and garden tools for 2023

Top 10 electric lawn and garden tools for 2023

Learn about the top 10 must-have electric lawn & garden tools for 2023…

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Grass line trimmer maintenance checklist

Grass line trimmer maintenance checklist

Find out how to take care of your grass line trimmer from the start of the trimming season until the end, with this help…