Description
Overview:
The Main Jet Screw O-Ring is a small, fuel‐resistant sealing ring for Kohler carburettors, supplied as a Genuine Kohler part (OEM No. 24 153 03-S). Made from durable, petrol‐resistant elastomer in a compact round profile, it sits on the main jet screw to create a tight seal that prevents fuel and air leaks. This helps maintain the correct air-fuel mixture, stable idle, and reliable starting. It is designed specifically for Kohler engines such as CH25 and LH630, commonly found in ride‐on mowers, turf machinery, and compact industrial equipment. Use it during routine servicing or when a worn seal is suspected to restore proper carburettor performance and protect the engine from lean running or poor throttle response.
Key Features:
- Genuine Kohler part for assured compatibility and quality (OEM 24 153 03-S)
- Precise fit on the main jet screw to prevent fuel and air leaks
- Fuel‐resistant elastomer withstands petrol and modern ethanol blends
- Resists heat, vibration, and compression set for long service life
- Helps maintain correct mixture, smooth idle, and clean acceleration
- Supports efficient running and easier starting after maintenance
- Compact round profile for simple handling during carburettor work
- Quick, straightforward replacement with basic tools
- Suitable for regular maintenance schedules or targeted repairs
- Matches Kohler specifications to avoid guesswork with sizing
Typical Applications:
Used during carburettor rebuilds and routine servicing on Kohler engines to cure seepage around the main jet screw, stabilise fueling, and improve reliability. Common on ride‐on and commercial mowers, turf machinery, small industrial equipment, and other applications powered by compatible Kohler models where consistent engine performance is required.
Also known as:
Carburettor jet screw seal, fuel jet O‐ring, jet screw seal ring, carb main jet seal, jet screw gasket (O‐ring), carburettor main jet seal ring.
Fits Models:
CH25, LH630, LH640, LH750, LH755
Alternate Part Numbers:
24 153 03S, 2415303-S, 2415303S
Product Specifications
| L&S Part No. | 24 153 03-S |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Kohler |
| OEM No. | 24 153 03- |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Kohler |
| Key Features | - Genuine Kohler part, OEM No. 24 153 03-S - Fits Kohler engines: CH25, LH630, LH640, LH750, LH755 - Fuel-resistant elastomer withstands petrol and ethanol blends - Prevents fuel and air leaks on main jet screw - Suitable for ride-on mowers and compact industrial equipment |
| Fits Models | LH630 | LH640 | LH750 | LH755 | CH25 |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
Related Products
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
