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Briggs & Stratton
Lawn & Garden Engine

Model # 121700 TO 121799 (4000-4003) Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 121700-TO-121799-4000-4003 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 291 parts  |
Spark Plug 298809
#337

Cylinder/intake - manifold diagram

Spark plug

Part #298809

Replaced by #796112S

?
Manufacturer substitution
This part replaces 298809. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.24 | 
16% OFF Phone Price : $6.24
In Stock
Spark Plug 293918
#337B

Cylinder/intake - manifold diagram

Spark plug

Part #293918

Replaced by #796112S

?
Manufacturer substitution
This part replaces 293918. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$5.24 | 
16% OFF Phone Price : $6.24
In Stock
Fuel Tank Cap 494277
#957B

Seal, o-ring/lin-fuel diagram

Fuel tank cap

Part #494277

Replaced by #796577

?
Manufacturer substitution
This part replaces 494277. Substitute parts can look different from the original.
BEST SELLER
$20.69 | 
22% OFF Phone Price : $26.69
In Stock
Fuel Cap 397974
#957

Seal, o-ring/lin-fuel diagram

Fuel cap

Part #397974

Replaced by #796577

?
Manufacturer substitution
This part replaces 397974. Substitute parts can look different from the original.
BEST SELLER
$20.69 | 
22% OFF Phone Price : $26.69
In Stock
Fuel Tank Cap 493017
#957A

Seal, o-ring/lin-fuel diagram

Fuel tank cap

Part #493017

Replaced by #796577

?
Manufacturer substitution
This part replaces 493017. Substitute parts can look different from the original.
BEST SELLER
$20.69 | 
22% OFF Phone Price : $26.69
In Stock
Air Cleaner Gasket 272653
Air cleaner gasket

Part #272653

Replaced by #795629

?
Manufacturer substitution
This part replaces 272653. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.51 | 
18% OFF Phone Price : $5.51
In Stock
Lawn & Garden Equipment Engine Carburetor Float (replaces Bs-398187) 398187
Lawn & garden equipment engine carburetor float (replaces bs-398187)

Part #398187

This item is not returnable
$11.96 | 
14% OFF Phone Price : $13.96
In Stock
Muffler 490547
#300

Gasket-muffler diagram

Muffler

Part #490547

Replaced by #692038

?
Manufacturer substitution
This part replaces 490547. Substitute parts can look different from the original.
$44.59 | 
12% OFF Phone Price : $50.59
In Stock
Fuel Valve 494539
#958A

Seal, o-ring/lin-fuel diagram

Fuel valve

Part #494539

Replaced by #698180

?
Manufacturer substitution
This part replaces 494539. Substitute parts can look different from the original.
This item is not returnable
$19.94 | 
9% OFF Phone Price : $21.94
In Stock
Seal Int El 270344
Seal int el

Part #270344

Replaced by #270344S

?
Manufacturer substitution
This part replaces 270344. Substitute parts can look different from the original.
This item is not returnable
$4.91 | 
17% OFF Phone Price : $5.91
In Stock

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