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Toro
Gas Line Trimmer

Model # 51974 (310000001 AND UP) Official Toro trimmer

Here are the diagrams and repair parts for Official Toro 51974-310000001-AND-UP trimmer, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 80 parts  |
Line Trimmer Air Filter Housing 308478001
#22

Muffler/carburetor/fuel tank/housing diagram

Line trimmer air filter housing

Part #308478001

The manufacturer no longer makes this part, and there's no substitute part

Screw M6x T660697001
#16

Powerhead/upper shaft/handle diagram

Screw m6x

Part #T660697001

The manufacturer no longer makes this part, and there's no substitute part

Line Trimmer Recoil Starter Assembly 308430001
#11

Muffler/carburetor/fuel tank/housing diagram

Line trimmer recoil starter assembly

Part #308430001

The manufacturer no longer makes this part, and there's no substitute part

Pulley Assembly 308004001
#8

Muffler/carburetor/fuel tank/housing diagram

Pulley assembly

Part #308004001

The manufacturer no longer makes this part, and there's no substitute part

Label Trim 940627020
#17

Trimmer head/straight shaft/guard diagram

Label trim

Part #940627020

The manufacturer no longer makes this part, and there's no substitute part

Rotor 640574002
#40

Muffler/carburetor/fuel tank/housing diagram

Rotor

Part #640574002

The manufacturer no longer makes this part, and there's no substitute part

Clutch Assembly 300756006
#38

Muffler/carburetor/fuel tank/housing diagram

Clutch assembly

Part #300756006

The manufacturer no longer makes this part, and there's no substitute part

Carburetor Gasket 900711008
#30

Muffler/carburetor/fuel tank/housing diagram

Carburetor gasket

Part #900711008

The manufacturer no longer makes this part, and there's no substitute part

Logo Label 940865001
#2

Powerhead/upper shaft/handle diagram

Logo label

Part #940865001

The manufacturer no longer makes this part, and there's no substitute part

Screw(m5x2 660344001
#35

Muffler/carburetor/fuel tank/housing diagram

Screw(m5x2

Part #660344001

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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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 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 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…

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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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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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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…

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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.…

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