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

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

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 90 parts  |
Line Trimmer Handle 791-182167
#9

Boom and trimmer diagram

Line trimmer handle

Part #791-182167

$102.80
In Stock
Rope Guide 753-1200
#25

Engine diagram

Rope guide

Part #753-1200

$20.63
In Stock
Gasket 753-04619
#46

Engine diagram

Gasket

Part #753-04619

$4.33
In Stock
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.
$30.64 | 
16% OFF Phone Price : $36.64
In Stock
Spring 753-04286
#24

Engine diagram

Spring

Part #753-04286

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

Carburetor Gasket 753-1208
#12

Engine diagram

Carburetor gasket

Part #753-1208

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

Boom Assembly 753-1212
#16

Boom and trimmer diagram

Boom assembly

Part #753-1212

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

Adjustment Knob 791-181981
#14

Boom and trimmer diagram

Adjustment knob

Part #791-181981

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

Piston 753-1209

#NI01

All parts diagram

Piston

Part #753-1209

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

Clamp Assembly 791-153597
#18

Boom and trimmer diagram

Clamp assembly

Part #791-153597

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.

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Why won't my gas line trimmer start?

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

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Why does my gas line trimmer run rough?

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

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Why does my gas line trimmer leak gas?

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

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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.

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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…

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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 …

Read more
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…

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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.

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Top 10 electric lawn and garden tools for 2023

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

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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.…

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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…

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