Description
Overview:
The Oil Seal - Genuine Briggs & Stratton Part - 399781S is a precision sealing component for small petrol engines used in garden and construction machinery. Manufactured from oil‐resistant synthetic rubber with metal reinforcement, it creates a tight seal around rotating shafts to prevent oil loss and keep dirt out. This helps maintain stable lubrication and prolongs engine life. As a Genuine Briggs & Stratton OEM part (399781S), it matches factory dimensions and tolerances for a dependable fit on selected Briggs & Stratton engines commonly found in lawnmowers, generators and compact equipment. Durable materials and an accurate profile support long service intervals and consistent performance, whether the seal is installed on the flywheel side or PTO side, depending on the engine design.
Key Features:
- Genuine Briggs & Stratton OEM part (399781S) for assured compatibility and correct fit
- Durable, oil‐resistant elastomer with metal reinforcement for long service life
- Reliable sealing helps prevent oil leaks and reduces contamination ingress
- Supports stable engine lubrication, improving efficiency and component protection
- Made to factory tolerances for easy installation and minimal downtime
- Suitable for use in a wide range of Briggs & Stratton powered garden and construction machines
- Helps maintain performance after routine servicing or rebuilds
- Designed for rotational shaft sealing in demanding small-engine environments
Typical Applications:
Used to seal rotating shafts on selected Briggs & Stratton engines in equipment such as lawnmowers, generators, pressure washers, tillers, plate compactors and light construction tools. Ideal when repairing oil leaks, during crankcase overhauls, or as preventative maintenance to keep engines operating smoothly and to protect internal components from dust and debris.
Also known as:
Radial shaft seal, PTO shaft seal, flywheel-side seal, lip seal, rotary oil seal, shaft oil seal, radial lip seal, small engine shaft seal, front/rear crank-end seal (application dependent).
Alternate Part Numbers:
399781S, BS399781S
Product Specifications
| L&S Part No. | BS399781S |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Briggs & Stratton |
| OEM No. | 399781S |
| Unit of Sale | 1 |
| Fits Brands | Briggs & Stratton |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Crankshaft - Briggs & Stratton - 597160£74.71 £62.26 -
![]()
Crankshaft - Briggs & Stratton - 797018£96.84 £80.70
