Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
MTD
Gas Line Trimmer

Model # YM70SS Official MTD trimmer

Here are the diagrams and repair parts for Official MTD YM70SS trimmer, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

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

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

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

Owner’s manual

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 84 parts  |
Yard Machines Lawn & Garden Equipment Engine Start/stop Switch (replaces 182405) 791-182405
#4

Shield/handle/drive shaft diagram

Yard machines lawn & garden equipment engine start/stop switch (replaces 182405)

Part #791-182405

BEST SELLER
$14.29 | 
12% OFF Phone Price : $16.29
In Stock
Kmart Line Trimmer Flexible Drive Shaft 753-05267
#17

Shield/handle/drive shaft diagram

Kmart line trimmer flexible drive shaft

Part #753-05267

$43.20 | 
12% OFF Phone Price : $49.20
In Stock
Yard Machines Line Trimmer Fuel Line (replaces 791-180243, 791-181168, 791-182495) 791-181086
#18

Cylinder/flywheel/fuel tank diagram

Yard machines line trimmer fuel line (replaces 791-180243, 791-181168, 791-182495)

Part #791-181086

$10.88 | 
16% OFF Phone Price : $12.88
In Stock
Line Trimmer Spool Spring (replaces 791-610317, 791-bq01642) 791-610317B
#25

Shield/handle/drive shaft diagram

Line trimmer spool spring (replaces 791-610317, 791-bq01642)

Part #791-610317B

$16.62 | 
11% OFF Phone Price : $18.62
In Stock
Yard Machines Lawn & Garden Equipment Engine Air Filter 791-180350B
#2

Cylinder/flywheel/fuel tank diagram

Yard machines lawn & garden equipment engine air filter

Part #791-180350B

This item is not returnable
$13.02 | 
13% OFF Phone Price : $15.02
In Stock
Line Trimmer Shaft Coupler 791-181616B
#11

Shield/handle/drive shaft diagram

Line trimmer shaft coupler

Part #791-181616B

Replaced by #753-1190

?
Manufacturer substitution
This part replaces 791-181616B. Substitute parts can look different from the original.
This item is not returnable
$31.62 | 
16% OFF Phone Price : $37.62
In Stock
Lawn & Garden Equipment Screw 791-182519
#40

Cylinder/flywheel/fuel tank diagram

Lawn & garden equipment screw

Part #791-182519

This item is not returnable
$6.73 | 
13% OFF Phone Price : $7.73
In Stock
Yard-man Lawn & Garden Equipment Bolt 791-182723
#51

Cylinder/flywheel/fuel tank diagram

Yard-man lawn & garden equipment bolt

Part #791-182723

This item is not returnable
$6.37
In Stock
Line Trimmer Drive Shaft Housing (replaces 753-04346, 753-04347, 753-04351) 753-04344
#6

Shield/handle/drive shaft diagram

Line trimmer drive shaft housing (replaces 753-04346, 753-04347, 753-04351)

Part #753-04344

$87.56 | 
6% OFF Phone Price : $93.56
In Stock
Muffler Screw 753-04620
#47

Cylinder/flywheel/fuel tank diagram

Muffler screw

Part #753-04620

Replaced by #710-04188A

?
Manufacturer substitution
This part replaces 753-04620. Substitute parts can look different from the original.
This item is not returnable
$6.35 | 
14% OFF Phone Price : $7.35
In Stock

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

View all

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…

Read more

Why won't my gas line trimmer start?

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

Read more

Why does my gas line trimmer leak gas?

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

Read more

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.

View all
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…

Read more
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…

Read more
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.

View all
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.…

Read more
Solving 3 common problems with line trimmer cutting lines

Solving 3 common problems with line trimmer cutting lines

Follow these tips to prevent the cutting line on your grass line trimmer from breaking or feeding out too much or too li…

Read more
How to replace a line trimmer fuel line video

How to replace a line trimmer fuel line video

Follow the steps in this video to replace a leaking fuel line in a line trimmer.…

Read more

Parts & More