Briggs & Stratton
Lawn & Garden Engine

Model # 121700 TO 121799 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 121700-TO-121799 engine, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 127 parts  |

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
Lawn & Garden Equipment Engine Blower Housing (replaces 696307) 493294
#304

Flywheel/guard-finger diagram

Lawn & garden equipment engine blower housing (replaces 696307)

Part #493294

$115.03
9% OFF Phone Price : $127.03
In Stock
Screw 496063
#955B

Carburetor/valve kit (i) diagram

Screw

Part #496063

In Stock
Briggs And Stratton Screw 94058
#65

Flywheel/guard-finger diagram

Briggs and stratton screw

Part #94058

This item is not returnable
In Stock
Briggs And Stratton Deflector-muffler 397931
#676A

Gasket-muffler diagram

Briggs and stratton deflector-muffler

Part #397931

In Stock
Spring 262659
#209D

Spring-governor diagram

Spring

Part #262659

In Stock
Briggs And Stratton Bushing-valve Guide 63709
#871A

Cylinder/intake - manifold diagram

Briggs and stratton bushing-valve guide

Part #63709

In Stock
Governor Spring 262658
#209C

Spring-governor diagram

Governor spring

Part #262658

In Stock
Bracket 493894
#620E

Bracket-control diagram

Bracket

Part #493894

In Stock
Spring 280973
#69

Starter-rewind diagram

Spring

Part #280973

In Stock

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

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.…