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Craftsman
Gas Line Trimmer

Model # 917773421 Official Craftsman high wheel line trimmer

Here are the diagrams and repair parts for Official Craftsman 917773421 high wheel line 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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Owner’s manual
  View engine

Model diagram and schematic

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ALL PARTS
Showing 10 of 221 parts  |
Lock Nut 83923
#27

Engine diagram

Lock nut

Part #83923

Replaced by #532409149

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Manufacturer substitution
This part replaces 83923. Substitute parts can look different from the original.
BEST SELLER
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$5.31 | 
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Hex Flange Lock Nut 145212
#14

Chassis assembly diagram

Hex flange lock nut

Part #145212

Replaced by #532409149

?
Manufacturer substitution
This part replaces 145212. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.31 | 
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Mow Ball Assembly 172342
#40

Chassis assembly diagram

Mow ball assembly

Part #172342

Replaced by #596878501

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Manufacturer substitution
This part replaces 172342. Substitute parts can look different from the original.
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$147.72 | 
8% OFF Phone Price : $159.72
In Stock
Line Trimmer Drive Pulley 169792
#25

Chassis assembly diagram

Line trimmer drive pulley

Part #169792

Replaced by #596878501

?
Manufacturer substitution
This part replaces 169792. Substitute parts can look different from the original.
BEST SELLER
$147.72 | 
8% OFF Phone Price : $159.72
In Stock
Line 169802
#2

Chassis assembly diagram

Line

Part #169802

Replaced by #VS155T21-24

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Manufacturer substitution
This part replaces 169802. Substitute parts can look different from the original.
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String Line 79991

#NI

All parts diagram

String line

Part #79991

Replaced by #VS155T21-24

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Manufacturer substitution
This part replaces 79991. Substitute parts can look different from the original.
BEST SELLER
$17.20 | 
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Lock Nut 751592
#8

Chassis assembly diagram

Lock nut

Part #751592

Replaced by #596322601

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Manufacturer substitution
This part replaces 751592. Substitute parts can look different from the original.
BEST SELLER
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$5.11
In Stock
Locking Plate 172519
#33

Chassis assembly diagram

Locking plate

Part #172519

Replaced by #532172519

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Manufacturer substitution
This part replaces 172519. Substitute parts can look different from the original.
This item is not returnable
$6.64 | 
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In Stock
Jackshaft 172520
#28

Chassis assembly diagram

Jackshaft

Part #172520

Replaced by #532172520

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Manufacturer substitution
This part replaces 172520. Substitute parts can look different from the original.
This item is not returnable
$34.98 | 
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Drive Control 174037
#28

Engine diagram

Drive control

Part #174037

Replaced by #583061601

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Manufacturer substitution
This part replaces 174037. Substitute parts can look different from the original.
$39.98 | 
13% OFF Phone Price : $45.98
In Stock

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…

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.

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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…

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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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