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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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Showing 10 of 80 parts  |
M5 X0.8 X1 660351001
#12

Muffler/carburetor/fuel tank/housing diagram

M5 x0.8 x1

Part #660351001

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

Screw, M4 660563002
#14

Powerhead/upper shaft/handle diagram

Screw, m4

Part #660563002

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

Line Trimmer Debris Shield 308473001
#18

Trimmer head/straight shaft/guard diagram

Line trimmer debris shield

Part #308473001

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

Support-handle, Rear 518122001
#5

Powerhead/upper shaft/handle diagram

Support-handle, rear

Part #518122001

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

Lower Ss A 308035013
#1

Trimmer head/straight shaft/guard diagram

Lower ss a

Part #308035013

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

Storage En 518019002
#19

Trimmer head/straight shaft/guard diagram

Storage en

Part #518019002

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

Washer 690695001
#33

Muffler/carburetor/fuel tank/housing diagram

Washer

Part #690695001

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

Screw 8-1 660669001
#15

Powerhead/upper shaft/handle diagram

Screw 8-1

Part #660669001

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

Line Trimmer Drive Shaft, Upper 308159015
#4

Powerhead/upper shaft/handle diagram

Line trimmer drive shaft, upper

Part #308159015

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

M5 X0.8 X6 660346001
#23

Muffler/carburetor/fuel tank/housing diagram

M5 x0.8 x6

Part #660346001

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 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…

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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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