Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
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 # 12S505-3856-B1 Official Briggs & Stratton engine

Here are the diagrams and repair parts for Official Briggs & Stratton 12S505-3856-B1 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 163 parts  |
Lawn & Garden Equipment Engine Carburetor Primer Bulb (replaces 496115, Bs-694395) 694395

#976

All parts diagram

Lawn & garden equipment engine carburetor primer bulb (replaces 496115, bs-694395)

Part #694395

BEST SELLER
This item is not returnable
$5.24 | 
16% OFF Phone Price : $6.24
In Stock
Lawn & Garden Equipment Engine Recoil Starter Rope (replaces 692259) 697316

#58

All parts diagram

Lawn & garden equipment engine recoil starter rope (replaces 692259)

Part #697316

BEST SELLER
$7.50 | 
12% OFF Phone Price : $8.50
In Stock
Lawn & Garden Equipment Engine Fuel Line (replaces 1734994sm, 327290ma, 691050, 7012638yp, 7032016yp, 7032956yp, 7041996yp, 7076272yp, 7077351yp, 791866, 798512, 809322, 809499) 791766

#187

All parts diagram

Lawn & garden equipment engine fuel line (replaces 1734994sm, 327290ma, 691050, 7012638yp, 7032016yp, 7032956yp, 7041996yp, 7076272yp, 7077351yp, 791866, 798512, 809322, 809499)

Part #791766

BEST SELLER
$9.59 | 
9% OFF Phone Price : $10.59
In Stock
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
$18.87 | 
10% OFF Phone Price : $20.87
In Stock
Lawn & Garden Equipment Engine Spark Plug 692051

#337

All parts diagram

Lawn & garden equipment engine spark plug

Part #692051

BEST SELLER
$8.59 | 
10% OFF Phone Price : $9.59
In Stock
Lawn & Garden Equipment Engine Fuel Tank (replaces 693377, Bs-699374) 699374

#972

All parts diagram

Lawn & garden equipment engine fuel tank (replaces 693377, bs-699374)

Part #699374

BEST SELLER
$58.46 | 
9% OFF Phone Price : $64.46
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
$23.76 | 
20% OFF Phone Price : $29.76
In Stock
Air Filter 273356

#967

All parts diagram

Air filter

Part #273356

Replaced by #273356S

?
Manufacturer substitution
This part replaces 273356. Substitute parts can look different from the original.
BEST SELLER
$9.51 | 
10% OFF Phone Price : $10.51
In Stock
Lawn & Garden Equipment Engine Recoil Starter (replaces Bs-497680) 497680

#608

All parts diagram

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

Part #497680

BEST SELLER
$93.54 | 
6% OFF Phone Price : $99.54
In Stock
Grip-str Rpe 281434

#60

All parts diagram

Grip-str rpe

Part #281434

Replaced by #281434S

?
Manufacturer substitution
This part replaces 281434. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$6.34 | 
14% OFF Phone Price : $7.34
In Stock

RECOMMENDED MAINTENANCE PARTS AND ACCESSORIES

Symptoms for electric ranges

Why doesn't my electric range's surface element heat properly?

Main causes: faulty surface element, burner control switch failure, temperature limiter not working properly, loose wiri…

Read more

Should I replace a damaged glass cooktop?

Main causes: impact from dropping an item on the glass surface, ceramic glass surface flaw, surface element temperature …

Read more

Repair guides for electric ranges

How to replace a range hidden bake element

How to replace a range hidden bake element

These step-by-step instructions guide you through replacing the oven hidden bake element in an electric range.…

Read more
Repair difficulty
Time required
 30 minutes or less
How to replace a range glass cooktop

How to replace a range glass cooktop

These step-by-step instructions explain how to replace a damaged ceramic glass cooktop on an electric range. …

Read more
Repair difficulty
Time required
 45 minutes or less
How to replace a range relay control board

How to replace a range relay control board

Follow these instructions to replace the relay control board if it isn't responding to signals from the microprocessor d…

Read more
Repair difficulty
Time required
 45 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