Briggs & Stratton
Lawn & Garden Engine

Model # 12H800 TO 12H899 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 12H800-TO-12H899 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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ALL PARTS
Showing 10 of 256 parts  |

Fuel Cap 397974
#957

Fuel tank assembly diagram

Fuel cap

Part #397974

Replaced by #796577

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Manufacturer substitution
This part replaces 397974. Substitute parts can look different from the original.
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Fuel Filter (red) 298090
#240

Fuel tank assembly diagram

Fuel filter (red)

Part #298090

Replaced by #298090S

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Manufacturer substitution
This part replaces 298090. Substitute parts can look different from the original.
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Air Cleaner Gasket 272653
Air cleaner gasket

Part #272653

Replaced by #795629

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Manufacturer substitution
This part replaces 272653. Substitute parts can look different from the original.
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Lawn & Garden Equipment Engine Recoil Starter Pulley (replaces 263074, 281504, Bs-498144) 498144
#56

Rewind starter diagram

Lawn & garden equipment engine recoil starter pulley (replaces 263074, 281504, bs-498144)

Part #498144

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Lawn & Garden Equipment Engine Recoil Starter (replaces Bs-497680) 497680
#608

Rewind starter diagram

Lawn & garden equipment engine recoil starter (replaces bs-497680)

Part #497680

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Grip-str Rpe 281434
#60

Rewind starter diagram

Grip-str rpe

Part #281434

Replaced by #281434S

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Manufacturer substitution
This part replaces 281434. Substitute parts can look different from the original.
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Pawl 281505
#459

Rewind starter diagram

Pawl

Part #281505

Replaced by #281505S

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Manufacturer substitution
This part replaces 281505. Substitute parts can look different from the original.
This item is not returnable
$5.80
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Lawn & Garden Equipment Engine Carburetor Float (replaces Bs-398187) 398187
#133

Carburetor diagram

Lawn & garden equipment engine carburetor float (replaces bs-398187)

Part #398187

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Retainer 281503
#456

Rewind starter diagram

Retainer

Part #281503

Replaced by #692299

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Manufacturer substitution
This part replaces 281503. Substitute parts can look different from the original.
This item is not returnable
$7.89
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Exhaust Muffler 497838
#300

Muffler assembly diagram

Exhaust muffler

Part #497838

Replaced by #692038

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Manufacturer substitution
This part replaces 497838. Substitute parts can look different from the original.
$44.59
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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.…