Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Briggs & Stratton
Lawn & Garden Engine

Model # 121A12-0277-E1 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 121A12-0277-E1 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 157 parts  |
Lawn & Garden Equipment Engine Air Filter (replaces 392672, 393365, 49245, 690610, Bs-697029) 697029

#445

All parts diagram

Lawn & garden equipment engine air filter (replaces 392672, 393365, 49245, 690610, bs-697029)

Part #697029

BEST SELLER
$19.44 | 
9% OFF Phone Price : $21.44
In Stock
Lawn & Garden Equipment Engine Spark Plug (replaces Bs-691043) 691043

#337

All parts diagram

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

Part #691043

BEST SELLER

Get free shipping with Automatic Reorder

$7.27 | 
12% OFF Phone Price : $8.27
In Stock
Lawn & Garden Equipment Engine Recoil Starter Pulley (replaces 263074, 281504, Bs-498144) 498144
Lawn & garden equipment engine recoil starter pulley (replaces 263074, 281504, bs-498144)

Part #498144

BEST SELLER
$24.47 | 
20% OFF Phone Price : $30.47
In Stock
Carburetor Kit 696998

#121

All parts diagram

Carburetor kit

Part #696998

Replaced by #792006

?
Manufacturer substitution
This part replaces 696998. Substitute parts can look different from the original.
$37.09 | 
14% OFF Phone Price : $43.09
In Stock
Pawl 281505

#459

All parts diagram

Pawl

Part #281505

Replaced by #281505S

?
Manufacturer substitution
This part replaces 281505. Substitute parts can look different from the original.
This item is not returnable
$5.80 | 
15% OFF Phone Price : $6.80
In Stock
Gasket 697001

#977

All parts diagram

Gasket

Part #697001

Replaced by #792006

?
Manufacturer substitution
This part replaces 697001. Substitute parts can look different from the original.
$37.09 | 
14% OFF Phone Price : $43.09
In Stock
Lawn & Garden Equipment Engine Carburetor Float (replaces Bs-398187) 398187

#133

All parts diagram

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 Recoil Starter Pawl Friction Plate (replaces 281503, Bs-692299) 692299

#456

All parts diagram

Lawn & garden equipment engine recoil starter pawl friction plate (replaces 281503, bs-692299)

Part #692299

This item is not returnable
$7.89 | 
11% OFF Phone Price : $8.89
In Stock
Lawn & Garden Equipment Engine Washer 271716

#276

All parts diagram

Lawn & garden equipment engine washer

Part #271716

This item is not returnable
$6.19 | 
14% OFF Phone Price : $7.19
In Stock
Lawn & Garden Equipment Engine Screw 697551

#914B

All parts diagram

Lawn & garden equipment engine screw

Part #697551

Replaced by #691108

?
Manufacturer substitution
This part replaces 697551. Substitute parts can look different from the original.
This item is not returnable
$5.09 | 
16% OFF Phone Price : $6.09
In Stock

RECOMMENDED MAINTENANCE PARTS AND ACCESSORIES

Repair guides for front-engine lawn tractors

How to replace a blade clutch cable on a riding lawn mower

How to replace a blade clutch cable on a riding lawn mower

If the blades don't spin on your riding mower when you shift the lever, the blade clutch cable could be broken. Here’s h…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a riding lawn mower blade drive belt

How to replace a riding lawn mower blade drive belt

Replace the blade drive belt if it's broken or won't spin the cutting blades because of wear.…

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace a riding lawn mower front tire

How to replace a riding lawn mower front tire

Get your mower moving again by using these instructions when replacing a damaged front tire.…

Read more
Repair difficulty
Time required
 60 minutes or less

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

View all
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.…

Read more
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.…

Read more

Parts & More