Craftsman
Gas Line Trimmer

Model # 154740940 Official Craftsman gas line trimmer

Here are the diagrams and repair parts for Official Craftsman 154740940 gas 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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For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

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Showing 10 of 44 parts  |

Line Trimmer Cutting Head 199023000066
#NI06

Body parts diagram

Line trimmer cutting head

Part #199023000066

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Line Trimmer Spark Plug 199999001291
#NI38

Engine parts diagram

Line trimmer spark plug

Part #199999001291

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$3.89
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Line Trimmer Carburetor 861398200101
#NI08

Body parts diagram

Line trimmer carburetor

Part #861398200101

Replaced by #199064000051

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Manufacturer substitution
This part replaces 861398200101. Substitute parts can look different from the original.
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Line Trimmer Cutting Head 199023000065
#NI14

Body parts diagram

Line trimmer cutting head

Part #199023000065

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Line Trimmer Drive Shaft, Lower 199999001284
#NI12

Body parts diagram

Line trimmer drive shaft, lower

Part #199999001284

$24.79
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Line Trimmer Drive Shaft, Upper 199999001311
#NI21

Body parts diagram

Line trimmer drive shaft, upper

Part #199999001311

$25.99
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Line Trimmer On/off Switch 207180200010
#NI25

Body parts diagram

Line trimmer on/off switch

Part #207180200010

Replaced by #207180200023

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Manufacturer substitution
This part replaces 207180200010. Substitute parts can look different from the original.
This item is not returnable
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Line Trimmer Gearbox 199999001283
#NI13

Body parts diagram

Line trimmer gearbox

Part #199999001283

$28.49
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Line Trimmer Air Filter Base And Choke Button 199077000008
#NI29

Engine parts diagram

Line trimmer air filter base and choke button

Part #199077000008

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Line Trimmer Throttle Cable 199081000107
#NI03

Body parts diagram

Line trimmer throttle cable

Part #199081000107

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Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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 carbure…

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

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.

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…

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 …

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…

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

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.…

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…