Briggs & Stratton
Lawn & Garden Engine

Model # 407777-0121-E4 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 407777-0121-E4 engine, as well as links to manuals and error code tables, if available.

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ALL PARTS
Showing 10 of 194 parts  |

Lawn & Garden Equipment Engine Inline Fuel Filter 691035

#240

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Lawn & garden equipment engine inline fuel filter

Part #691035

Replaced by #84001895

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Manufacturer substitution
This part replaces 691035. Substitute parts can look different from the original.
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Oil Filter 492932

#1027

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Oil filter

Part #492932

Replaced by #492932S

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Manufacturer substitution
This part replaces 492932. Substitute parts can look different from the original.
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Oil Filter 499486

#445

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Oil filter

Part #499486

Replaced by #499486S

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Manufacturer substitution
This part replaces 499486. Substitute parts can look different from the original.
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Fuel Line (red) 691050

#187

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Fuel line (red)

Part #691050

Replaced by #791766

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Manufacturer substitution
This part replaces 691050. Substitute parts can look different from the original.
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Lawn & Garden Equipment Engine Spark Plug (replaces Bs-691043) 691043

#337

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Lawn & garden equipment engine spark plug (replaces bs-691043)

Part #691043

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Key 222698

#24

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Key

Part #222698

Replaced by #222698S

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Manufacturer substitution
This part replaces 222698. Substitute parts can look different from the original.
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Starter Gear 693058

#783

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Starter gear

Part #693058

Replaced by #695708

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This part replaces 693058. Substitute parts can look different from the original.
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Lawn & Garden Equipment Engine Rocker Arm Cover Gasket (replaces 273486) 690971

#1022

All parts diagram

Lawn & garden equipment engine rocker arm cover gasket (replaces 273486)

Part #690971

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Gasket Crank 690945

#12

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Gasket crank

Part #690945

Replaced by #594195

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This part replaces 690945. Substitute parts can look different from the original.
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Carburetor 499804

#125

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Carburetor

Part #499804

Replaced by #791230

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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.…