Briggs & Stratton
Lawn & Garden Engine

Model # 40H777-0124-G1 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 40H777-0124-G1 engine, 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 283 parts  |

Oil Filter 795890
#1027A

Engine sump/oil pump/dipstick diagram

Oil filter

Part #795890

Replaced by #696854

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Manufacturer substitution
This part replaces 795890. Substitute parts can look different from the original.
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Craftsman Lawn & Garden Equipment Engine Oil Filter (replaces 24603, 492932, 691041, 7045184yp, Bs-492932s) 492932S
#1027B

Engine sump/oil pump/dipstick diagram

Craftsman lawn & garden equipment engine oil filter (replaces 24603, 492932, 691041, 7045184yp, bs-492932s)

Part #492932S

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Lawn & Garden Equipment Engine Air Filter (replaces Bs-792105) 792105
#445B

Blower housing/air cleaner/muffler diagram

Lawn & garden equipment engine air filter (replaces bs-792105)

Part #792105

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Lawn & Garden Equipment Engine Fuel Line (replaces 1734994sm, 327290ma, 691050, 7012638yp, 7032016yp, 7032956yp, 7041996yp, 7076272yp, 7077351yp, 791866, 798512, 809322, 809499) 791766
#187

Carburetor/fuel supply diagram

Lawn & garden equipment engine fuel line (replaces 1734994sm, 327290ma, 691050, 7012638yp, 7032016yp, 7032956yp, 7041996yp, 7076272yp, 7077351yp, 791866, 798512, 809322, 809499)

Part #791766

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Lawn & Garden Equipment Engine Foam Air Pre-filter (replaces 273638, 691016, Bs-273638s) 273638S
Lawn & garden equipment engine foam air pre-filter (replaces 273638, 691016, bs-273638s)

Part #273638S

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Lawn & Garden Equipment Engine Oil Seal (replaces 791892, Bs-795387) 795387
Lawn & garden equipment engine oil seal (replaces 791892, bs-795387)

Part #795387

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Magneto Armature 799651
#333

Alternator/wire harness/starter diagram

Magneto armature

Part #799651

Replaced by #592846

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Manufacturer substitution
This part replaces 799651. Substitute parts can look different from the original.
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Lawn & Garden Equipment Engine Flywheel Key (replaces 222698, 690974, Bs-222698s) 222698S
#24

Cylinder/crankshaft/camshaft diagram

Lawn & garden equipment engine flywheel key (replaces 222698, 690974, bs-222698s)

Part #222698S

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Lawn & Garden Equipment Engine Pre-filter (replaces Bs-792303) 792303
#967A

Blower housing/air cleaner/muffler diagram

Lawn & garden equipment engine pre-filter (replaces bs-792303)

Part #792303

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Lawn & Garden Equipment Engine Starter Pinion Gear (replaces 693058, 693059, 75264) 695708
#783

Alternator/wire harness/starter diagram

Lawn & garden equipment engine starter pinion gear (replaces 693058, 693059, 75264)

Part #695708

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Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair difficulty
Time required
 45 minutes or less

Effective articles & videos to help repair your lawn & garden engines

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

What are the main components of a lawn mower?

What are the main components of a lawn mower?

Learn about the main parts of a lawn mower and when to replace parts.…