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MTD
Gas Line Trimmer

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

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

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 47 parts  |
Knob Wing Nut 720-0284
#12

Mower diagram

Knob wing nut

Part #720-0284

Replaced by #720-04072A

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Manufacturer substitution
This part replaces 720-0284. Substitute parts can look different from the original.
BEST SELLER
$9.33 | 
10% OFF Phone Price : $10.33
In Stock
Lawn Tractor Screw, 1/4-20 X 5/8-in (replaces 910-1652) 710-1652
#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
$5.44 | 
16% OFF Phone Price : $6.44
In Stock
Cable Tie 726-0240
#10

Mower diagram

Cable tie

Part #726-0240

Replaced by #726-0178

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Manufacturer substitution
This part replaces 726-0240. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Yard Machines Lawn & Garden Equipment Cupped Washer 736-0270
#24

Mower diagram

Yard machines lawn & garden equipment cupped washer

Part #736-0270

This item is not returnable
$5.10 | 
16% OFF Phone Price : $6.10
In Stock
Yard Machines Lawn Mower Throttle Control Housing 746-0883
#6

Mower diagram

Yard machines lawn mower throttle control housing

Part #746-0883

This item is not returnable
$21.96 | 
21% OFF Phone Price : $27.96
In Stock
Ace Lawn & Garden Equipment Flange Lock Nut 712-3004A
#34

Mower diagram

Ace lawn & garden equipment flange lock nut

Part #712-3004A

This item is not returnable
$4.92 | 
17% OFF Phone Price : $5.92
In Stock
Toro Lawn & Garden Equipment Hex Screw 710-3015
#25

Mower diagram

Toro lawn & garden equipment hex screw

Part #710-3015

This item is not returnable
$5.12 | 
16% OFF Phone Price : $6.12
In Stock
Line Trimmer Idler Arm Pulley 756-1198
#37

Mower diagram

Line trimmer idler arm pulley

Part #756-1198

$60.67
In Stock
Line Trimmer Extension Spring 732-1022
#38

Mower diagram

Line trimmer extension spring

Part #732-1022

This item is not returnable
$7.83
In Stock
V-belt 754-0625A
#47

Mower diagram

V-belt

Part #754-0625A

Replaced by #954-0625A

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Manufacturer substitution
This part replaces 754-0625A. Substitute parts can look different from the original.

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$34.64 | 
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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

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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

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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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