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MTD
Gas Snowblower

Model # 31AM6BHF793 Official MTD gas snowthrower

Here are the diagrams and repair parts for Official MTD 31AM6BHF793 gas snowthrower, 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.

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 186 parts  |
Lawn & Garden Equipment Cotter Pin, 1/4- To 5/16-in 714-04040
Lawn & garden equipment cotter pin, 1/4- to 5/16-in

Part #714-04040

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Snowblower Auger Clutch Cable (replaces 946-04230a) 946-04230B
#28

Transmission diagram

Snowblower auger clutch cable (replaces 946-04230a)

Part #946-04230B

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Troybilt Snowblower Shear Pin (replaces 738-04124) 738-04124A
Troybilt snowblower shear pin (replaces 738-04124)

Part #738-04124A

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Snowblower Auger Drive Belt (replaces 2705614, 954-04050a) 256963
#19

Engine drive diagram

Snowblower auger drive belt (replaces 2705614, 954-04050a)

Part #256963

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Yard Machines Lawn & Garden Equipment Nut 712-04064
Yard machines lawn & garden equipment nut

Part #712-04064

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Yard Machines Lawn Tractor Flange Nut (replaces 00012173, Wd-129-103) 712-04065
Yard machines lawn tractor flange nut (replaces 00012173, wd-129-103)

Part #712-04065

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Snowblower Speed Selector Cable (replaces 746-04396, 746-04396a) 946-04396A
#24

Handle panel diagram

Snowblower speed selector cable (replaces 746-04396, 746-04396a)

Part #946-04396A

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Snowblower Auger Shaft Gear (replaces 717-04861, 917-0528a) 917-04861
#8

Auger gearbox assy diagram

Snowblower auger shaft gear (replaces 717-04861, 917-0528a)

Part #917-04861

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Yard-man Snowblower Spring 732-04460
#11

Impeller diagram

Yard-man snowblower spring

Part #732-04460

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Lawn Tractor Self-tapping Screw, 5/16-18 X 3/4-in (replaces 01008620) 710-04484
Lawn tractor self-tapping screw, 5/16-18 x 3/4-in (replaces 01008620)

Part #710-04484

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Symptoms for gas snowblowers

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How do I tune up my snowblower?

Things to do: replace the spark plug, change the oil, rebuild the carburetor, adjust valve lash, adjust or replace the b...

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Why won't my snowblower throw snow far enough?

Main causes: clogged chute, damaged auger blades, broken shear pins, worn auger belt, damaged gear case, engine problems...

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Why does my snowblower stop running after a few seconds?

Main causes: dirty carburetor, stale fuel...

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What should I do about a damaged snowblower tire?

Main causes: punctured tire, damaged rim...

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Why does my snowblower engine run rough?

Main causes: dirty carburetor, clogged fuel filter, dirty spark plug, incorrect valve lash, leaky engine gaskets...

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Why won't my snowblower start?

Main causes: stale gas, clogged carburetor, clogged or broken fuel line, dirty spark plug, bad rewind starter, incorrect...

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Why doesn't my snowblower self propel?

Main causes: loose drive clutch cable, damaged drive clutch cable, worn friction disc, scraper blade scraping the ground...

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Why won't my snowblower chute turn?

Main causes: snow build-up in chute, chute drive mechanism failure, bad chute control assembly...

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Why won't my snowblower clear snow well?

Main causes: clogged chute, snow build-up in auger housing, broken auger shear pins, auger drive belt needs adjustment, ...

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Repair guides for gas snowblowers

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How to adjust snowblower engine valve lash

Adjust the engine valve lash on your snowblower to keep the engine starting and running smoothly....

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How to adjust snowblower skid shoes

To prevent snowblower auger and shave plate damage, adjust the skid shoes regularly to keep the shave plate ¼-inch high....

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Follow the 7 easy steps in this repair guide/video to replace a worn out shave plate on your snowblower....

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