MTD
Gas Line Trimmer

Model #25A-203L729 Official MTD high wheel trimmer mower

Here are the diagrams and repair parts for MTD 25A-203L729 high wheel trimmer mower, as well as links to manuals and error code tables, if available.

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

Owner’s manual

Showing 10 of 47 parts

Lawn & Garden Equipment Hex Bolt, 3/8-24 x 1-1/2-in (replaces 910-1044)#46

Mower Diagram

Lawn & garden equipment hex bolt, 3/8-24 x 1-1/2-in (replaces 910-1044)

Part #710-1044
BEST SELLER
This item is not returnable
In Stock
$2.97 | 
25% OFF 
Phone Price: $3.97
Lawn Tractor Screw, 1/4-20 x 5/8-in (replaces 910-1652)#17

Mower Diagram

Lawn tractor screw, 1/4-20 x 5/8-in (replaces 910-1652)

Part #710-1652
BEST SELLER
This item is not returnable
In Stock
$4.78 | 
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Phone Price: $5.78
Lawn Mower Throttle Control Housing#6

Mower Diagram

Lawn mower throttle control housing

Part #746-0883
This item is not returnable
In Stock
$21.39 | 
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Phone Price: $26.39
Lawn & Garden Equipment Flange Lock Nut#34

Mower Diagram

Lawn & garden equipment flange lock nut

Part #712-3004A
This item is not returnable
In Stock
$4.79 | 
17% OFF 
Phone Price: $5.79
Line Trimmer Extension Spring#38

Mower Diagram

Line trimmer extension spring

Part #732-1022
This item is not returnable
In Stock
$4.40
Lawn & Garden Equipment Bell Washer#45

Mower Diagram

Bell washer

Part #736-0452
Replaced by #936-0452
?
Manufacturer substitution
This part replaces 736-0452. Substitute parts can look different from the original.
This item is not returnable
In Stock
$3.13
Lawn & Garden Equipment Nut#5

Mower Diagram

Lawn & garden equipment nut

Part #712-0324
This item is not returnable
In Stock
$4.59 | 
18% OFF 
Phone Price: $5.59
Lawn & Garden Equipment Guide Bolt#4

Mower Diagram

Lawn & garden equipment guide bolt

Part #710-1205
This item is not returnable
In Stock
$4.89 | 
17% OFF 
Phone Price: $5.89
Line Trimmer Spacer#22

Mower Diagram

Line trimmer spacer

Part #750-1240
This item is not returnable
In Stock
$3.48
Lawn & Garden Equipment Flat Washer#23

Mower Diagram

Lawn & garden equipment flat washer

Part #736-0182
This item is not returnable
In Stock
$4.33

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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

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.

October 1, 2013
By Lyle Weischwill
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 these instructions to do the job in under 30 minutes.

Repair difficulty
Time required
 15 minutes or less
October 1, 2013
By Lyle Weischwill
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 instructions to replace the carburetor in under 30 minutes.

Repair difficulty
Time required
 15 minutes or less
October 1, 2013
By Lyle Weischwill
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 yourself, following these instructions.

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.

February 11, 2023

Top 10 electric lawn and garden tools for 2023

By Lyle Weischwill

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

August 30, 2022

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

By Lyle Weischwill

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

March 1, 2016

Grass line trimmer maintenance checklist

By Lyle Weischwill

Find out how to take care of your grass line trimmer from the start of the trimming season until the end, with this helpful maintenance checklist.