Briggs & Stratton
Lawn & Garden Engine

Model # 400700 TO 400799 (1200 - 1200) Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 400700-TO-400799-1200-1200 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 222 parts  |

Filter 394358

#240

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Filter

Part #394358

Replaced by #394358S

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Manufacturer substitution
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Plug 394539

#337

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Plug

Part #394539

Replaced by #796112S

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Manufacturer substitution
This part replaces 394539. Substitute parts can look different from the original.
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Cartridge 394019

#445

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Cartridge

Part #394019

Replaced by #394019S

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Manufacturer substitution
This part replaces 394019. Substitute parts can look different from the original.
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Element 271271

#535

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Element

Part #271271

Replaced by #272490S

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This part replaces 271271. Substitute parts can look different from the original.
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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 280104

#783

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Starter gear

Part #280104

Replaced by #695708

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Manufacturer substitution
This part replaces 280104. Substitute parts can look different from the original.
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Start Mower 394808

#309A

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Start mower

Part #394808

Replaced by #497596

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Elbow Spacer Plug 66538

#635

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Elbow spacer plug

Part #66538

Replaced by #66538S

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This part replaces 66538. Substitute parts can look different from the original.
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$5.11
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Oil Seal 391086

#3

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Oil seal

Part #391086

Replaced by #391086S

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This item is not returnable
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Oil Plug 91084

#15

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Oil plug

Part #91084

Replaced by #690946

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This part replaces 91084. Substitute parts can look different from the original.
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$9.59
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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.…