Genuine Briggs & Stratton Center Outlet Muffler 808911
The Briggs & Stratton 808911 Muffler is a genuine OEM center-outlet exhaust muffler used on select Briggs & Stratton Vanguard horizontal-shaft V-Twin engines.
Briggs identifies 808911 as a 5-inch round center-outlet muffler for compatible horizontal 38-series engine configurations. It is commonly associated with select 380400, 381400, 385400 and 386400 family engines.
Important exhaust orientation: 808911 is the center-outlet muffler configuration. Briggs also lists different muffler assemblies for applications requiring a starter-side or oil-filter-side exhaust outlet.
Verify your full Briggs & Stratton Model, Type and Code and the required exhaust orientation before ordering.
Briggs & Stratton 808911 Product Details
| 808911 Muffler Specifications | |
|---|---|
| Manufacturer | Briggs & Stratton |
| Part Number | 808911 |
| Part Type | Engine Muffler / Exhaust Assembly |
| Condition | New |
| Part Quality | Genuine OEM Briggs & Stratton |
| Muffler Shape | 5-Inch Round |
| Exhaust Orientation | Center Outlet |
| Engine Orientation | Horizontal Shaft |
| Primary Engine Family | Briggs & Stratton Vanguard 38-Series V-Twin |
| Common Engine Families | 380400, 381400, 385400 and 386400 Series |
| Current Briggs Part Number | 808911 |
What Is a Center Outlet Muffler?
The center outlet designation describes the exhaust routing of the muffler. On compatible Vanguard horizontal engines, 808911 routes the exhaust through the center-outlet configuration specified by Briggs & Stratton.
Exhaust orientation matters because engines in the same basic family can be installed in different equipment with different frame clearance, guards, fuel tanks and surrounding components.
808911 vs. Other Vanguard 38-Series Mufflers
| Briggs Part Number | Exhaust Configuration |
|---|---|
| 808705 | Starter-Motor-Side Outlet |
| 808896 | Oil-Filter-Side Outlet |
| 808911 | Center Outlet |
These mufflers should not be considered interchangeable solely because they are used with related Vanguard engines. Select the exhaust configuration specified for the equipment.
What Engines Use Briggs & Stratton 808911?
Briggs & Stratton documents 808911 for select horizontal Vanguard 38-series engine configurations.
Common engine families include:
Carroll Stream's existing application data includes numerous exact Type and Code combinations within these families. Examples include:
- 380442-0102-E1
- 380447-0024-E1
- 380447-0163-E1
- 381447-0154-E1
- 385442-0113-G1
- 385446-0155-G1
- 385447-0075-G1
- 385447-0162-H7
- 385447-0199-G1
- 386447-0058-G1
This list does not mean every 3804, 3814, 3854 or 3864 engine uses 808911. Briggs produced many Type and Code variations within these engine families. Verify the complete engine identification before purchasing.
Is 808911 for Horizontal or Vertical Engines?
808911 is a horizontal-shaft Vanguard muffler application. Briggs' exhaust documentation identifies the center-outlet 808911 for Vanguard 380400 and 381400 horizontal-crankshaft engines and newer accessory catalogs list it for horizontal 3854 and 3864 applications.
Briggs uses a different muffler and manifold configuration on comparable 380700 and 381700 vertical-shaft engines, so engine orientation should be confirmed before ordering.
Common 808911 Exhaust Installation Parts
Depending on the exact engine specification, the following Briggs & Stratton exhaust parts are commonly shown with 808911. These parts should be considered separate unless the product listing specifically states that they are included.
| Briggs Part Number | Description | Typical Application |
|---|---|---|
| 806425 | Exhaust Gasket | Commonly 2 on applicable V-Twin engines |
| 691902 | Exhaust / Muffler Mounting Screw | Quantity varies by engine diagram |
| 808085 | Muffler Spacer | 2 shown with current center-outlet accessory configuration |
| 806965 | Exhaust Flange | 2 shown with current center-outlet accessory configuration |
For example, Briggs parts information for compatible 386447 engines lists 808911 together with exhaust gaskets, spacers, mounting hardware and exhaust flanges. The exact hardware configuration should be checked in the parts diagram for the specific engine.
Briggs & Stratton 806425 Exhaust Gaskets
Many compatible 808911 installations use Briggs & Stratton 806425 exhaust gaskets. On applicable V-Twin engines, two gaskets are commonly required, one for each cylinder exhaust connection.
Inspect the existing exhaust gaskets whenever the muffler is removed. Damaged, burned or compressed gaskets should be replaced as required by the engine parts diagram and service procedure.
How to Confirm Briggs & Stratton 808911 Fitment
Locate the Briggs & Stratton engine identification information and record the complete Model, Type and Code.
Before ordering, confirm:
- The engine is a compatible horizontal-shaft Vanguard V-Twin.
- The parts diagram specifies muffler 808911.
- The application requires a center-outlet exhaust configuration.
- There is adequate clearance around the muffler and exhaust outlet.
- The required gaskets, spacers, flanges and mounting hardware are available.
Need help confirming fitment? Contact Carroll Stream Motor Company at 1-888-208-2088 with your complete Briggs & Stratton Model, Type and Code.
Briggs & Stratton 808911 Muffler FAQs
What is Briggs & Stratton part number 808911?
Briggs & Stratton 808911 is a genuine OEM 5-inch round center-outlet muffler for select horizontal Vanguard 38-series engines.
Is 808911 a center-outlet muffler?
Yes. Briggs identifies 808911 as the center-outlet muffler configuration for compatible horizontal Vanguard engines.
What is the difference between 808705, 808896 and 808911?
Briggs identifies 808705 as the starter-motor-side outlet muffler, 808896 as the oil-filter-side outlet muffler and 808911 as the center-outlet muffler.
Does Briggs & Stratton 808911 fit 380447 engines?
808911 is used on many 380447 Type and Code combinations. Confirm the complete 380447 engine identification because not every configuration necessarily uses the same exhaust system.
Does 808911 fit Briggs & Stratton 385447 engines?
Yes, 808911 is documented on multiple 385447 horizontal-engine specifications. Exact fitment should be confirmed using the complete Model, Type and Code.
Does Briggs & Stratton 386447 use muffler 808911?
Yes. Briggs parts diagrams show 808911 on numerous 386447 horizontal-engine specifications, including center-outlet exhaust configurations.
Is Briggs & Stratton 808911 for horizontal or vertical engines?
808911 is used as a horizontal-shaft engine muffler on compatible Vanguard 38-series configurations.
What exhaust gasket is used with Briggs & Stratton 808911?
Many compatible applications use Briggs & Stratton 806425 exhaust gaskets. Verify the exact engine parts diagram before ordering installation parts.
Are exhaust gaskets included with 808911?
Do not assume gaskets, spacers, flanges or mounting hardware are included unless Carroll Stream specifically lists them as part of the package.
Has Briggs & Stratton 808911 been superseded?
Briggs & Stratton currently lists 808911 as an active genuine OEM muffler part number. No verified Briggs superseding part number was found.
How do I know if 808911 fits my engine?
Match the complete Briggs & Stratton engine Model, Type and Code to the applicable exhaust parts diagram and confirm that the engine calls for the 808911 center-outlet muffler.
